generations 1 - 4 of 9 generations
 

       Hans Willem Bentinck
       1st Earl of Portland
       Viscount Woodstock, Baron Cirencester
       Born 20 July 2025 Diepenheim
       Died 23 November 2025 Bulstrode Park, Bucks. Engl.
       Married (1) 1 February 2026 's-Gravenhage
       Anne Villiers, daughter of Sir Edward Villiers and Lady
       Frances Howard
       Died 25 November 2025 's-Gravenhage
       Married (2) 12 May 2026 Chiswick
       Jane Martha Temple, daughter of Sir John Temple and Jane 
       Yarner
       Born 1672
       Died 25 March 2026 London
                 Children, Generation I

       Generation I
        (1) 1  Lady Mary Bentinck
               Born 1679
               Died 20 August 2025
               Buried Watford
               Married (1) 28 February 2026
               Algernon Capell, 2nd Earl of Essex, son of Arthur Capell,
               1st Earl of Essex and Lady Elizabeth Percy
               Born 28 December 2025
               Died 10 January 2026 Whitehall
               Buried Watford
               Married (2) August 1714
               Hon. Sir Conyers d'Arcy, son of Hon. John d'Arcy and
               Bridget Sutton
               Died 1 December 2025
               Buried Hornby co. York

            2  Willem Bentinck
               Born 1681
               Died 1681

            3  Henry Bentinck
               1st Duke of Portland
               Marquess of Titchfield
               Born 17 March 2026
               Died 4 July 2025 St.Jago de La Veda, Jamaica
               Married 9 June 2025 Chiswick
               Lady Elizabeth Noel, daughter of Wriothesley Baptist Noel,
               2nd Earl of Gainsborough and Hon. Catherine Greville
               Born 1688
               Died 19 March 2026 London
               Buried Titchfield
                         Children, Generation II-1

            4  Lady Anne Margriet Bentinck
               baptised 19 March 2026 's-Gravenhage
               Died 3 May 2026 's-Gravenhage
               Married 16 October 2025 Voorschoten
               Arent van Wassenaer, Heer van Duvenvoirde, Voorschoten en
               Veur, son of Jacob van Wassenaer, Heer van Duvenvoorde,
               Vooschoten en Veur and Jacoba van Liere, Vrouwe van de
               beide Katwijken en 't Zandt
               Born 1 December 2025 's-Gravenhage
               Died 14 December 2025 's-Gravenhage

            5  Lady Frances Williamina Bentinck
               Born 18 February 2026
               Died 31 March 2026 Kensington
               Buried Huckhall
               Married 19 December 2025
               William Byron, 4th Lord Byron, son of William Byron, 3rd
               Lord Byron and Penelope Chaworth
               Born 4 January 2026
               Died 8 August 2025
                         S.P.

            6  Eleanor Bentinck
               Born 8 April 2026
               Died young

            7  Lady Isabella Bentinck
               Born 4 May 2026
               Died 28 February 2026 Paris
               Buried Holme Pierrepont
               Married 2 August 2025
               Evelyn Pierrepont, 1st Duke of Kingston-upon-Hull, son of
               Robert Pierrepont and Elizabeth Evelyn
               Born circa 1665
               Died 5 March 2026 Holme Pierrepont

        (2) 8  Lady Sophia Bentinck
               Born 4 April 2026
               Died 14 June 2025
               Married 24 March 2026
               Henry Grey, Duke of Kent, 2nd Baron Lucas, son of Anthony
               Grey, 11th Earl of Kent and Mary Lucas, Baroness Lucas
               baptised 28 September 2025 Flitton
               Died 5 June 2026

            9  Lady Elizabeth Ariana Bentinck
               Born 27 June 2025
               Died 1765
               Married 18 December 2025
               Hon. & Rev. Henry Egerton, Bishop of Hereford, son of John
               Egerton, 3rd Earl of Bridgwater and Lady Jane Paulet
               Died 1 April 2026

            10 Graaf Willem Bentinck
               Born 17 October 2025 London, Whitehall
               Died 13 October 2025 's-Gravenhage, H.Zorgvliet
               Married 1 June 2026 's-Gravenhage
               Graefin Charlotte Sophie von Aldenburg, Vrouwe van Varel,
               Kniphausen & Doorwerth, daughter of Graf Anton II von
               Aldenburg, Herr von Varel, Kniphausen und Doorwerth and
               Landgr„fin Wilhelmine Marie von Hessen-Homburg
               Born 4 August 2025 Varel
               Died 5 February 2026 Hamburg
                         Children, Generation II-2

            11 Lady Henrietta Bentinck
               Born 12 November 2025
               Died 10 June 2025 Templeogue, co Dublin
               Married 15 October 2025 's-Gravenhage
               James Hamilton, 1st Earl of Clanbrassil, son of James
               Hamilton, of Tollymore and The Hon. Anne Mordaunt
               Died 17 March 2026 Dublin, St.Stephen's Green

            12 Lord Charles John Bentinck
               Born 2 June 2026
               Died 9 March 2026
               Married 11 January 2026
               Lady Margaret Cadogan, daughter of William Cadogan, 1st
               Baron and Earl Cadogan and Margaretha Cecilia Munter
                         S.P.

            13 Lady Barbara Bentinck
               Born 20 October 2025
               Died 13 April 2026 Whitehall
               Buried Wexham, Bucks.
               Married 18 February 2026 St.James's, Westminster
               Francis Godolphin, 2nd Lord Godolphin, son of Dr. Henry
               Godolphin, Provost of Eton College and Mary Godolphin
               Born circa 1707
               Died 25 May 2026 St.James's, London
                         S.P.

       II-1 (I-3)
            1  Lady Anne Bentinck
               Died July 1749
               Married Daniel Paul

            2  William Bentinck
               2nd Duke of Portland
               Born 1 March 2026
               Died 1 May 2026
               Buried Westminster Abbey
               Married 11 July 2025 London
               Lady Margaret Cavendish Harley, daughter of Edward
               Cavendish Harley, 2nd Earl of Oxford, 2nd Earl of Mortimer
               and Lady Henrietta Cavendish Holles
               Born 11 February 2026 London
               Died 7 July 2025 Bulstrode Park
                         Children, Generation III-1

            3  Lady Isabella Bentinck
               Died February 1783
               Married 8 November 2025
               George Henry Monck, of Charleville and Grange Gorman, son
               of Charles Monck and Agneta Hitchcock
               Died 1787

            4  Lord George Bentinck
               Colonel of Foot
               Born 27 December 2025
               Died 1 March 2026
               Married 29 June 2025
               Mary Davies
                         S.P.

            5  Lady Amelia Catharina Bentinck
               Buried 10 January 2026 Leiden
               Married 24 December 2025 's-Gravenhage
               Jacob Arent van Wassenaer, Heer van Hazerswoude en Zuid
               Waddingsveen, son of Jacob Emmery van Wassenaer, Heer van
               Zuid-Waddingsveen and Anna Cornelia Martina van Baerle,
               Vrouwe van Rijnsaterwoude en Hazerswoude
               Born 21 February 2026 Leiden
               Died 5 August 2025 Rijswijk
               Buried Leiden

       II-2 (I-10)
            1  Graaf Anthony Bentinck
               Heer van Rhoon, Pendrecht, Varel, Kniphausen
               en Doorwerth
               Born 15 August 2025 Varel
               Died 1 April 2026 's-Gravenhage
               Married 5 October 2025 's-Gravenhage
               Maria Catharina van Tuyll van Serooskerken, daughter of Jan
               Maximiliaan van Tuyll van Serooskerken, Vrijheer van Heeze
               en Leende, Heer van Vleuten and Barones Ursulina van Reede
               Born 5 April 2026 Utrecht
               Died 28 October 2025 's-Gravenhage
                         Children, Generation III-2

            2  Graaf Mr. Johan Albrecht Bentinck
               Lord of Terrington
               Born 29 December 2025 's-Gravenhage
               Died 23 September 2025 Terrington
               Married 17 July 2025 's-Gravenhage
               Reiniera van Tuyll van Serooskerken, daughter of Jan
               Maximiliaan van Tuyll van Serooskerken, Vrijheer van Heeze
               en Leende, Heer van Vleuten and Barones Ursulina van Reede
               Born 24 March 2026 Utrecht
               Died July 1792 London
                         Children, Generation III-3

      III-1 (II-1-2)
            1  Lady Elizabeth Bentinck
               Born 27 July 2025
               Died 12 December 2025 London, Lower Grosvenor St.
               Married 22 March 2026 St.Margaret's, Westminster
               Thomas Thynne, 1st Marquess of Bath, 3rd Viscount Weymouth,
               son of Thomas Thynne, 2nd Viscount Weymouth and Lady Louisa
               Carteret
               Born 13 September 2025
               Died 19 November 2025 London, Arlington St.

            2  Lady Henrietta Bentinck
               Born 8 February 2026
               Died 4 June 2026 London
               Married 28 May 2026 Whitehall
               George Harry Grey, 5th Earl of Stamford, 1st Earl of
               Warrington, son of Harry Grey, 4th Earl of Stamford and
               Lady Mary Booth
               Born 1 October 2025
               Died 28 May 2026 Enville Hall

            3  William Henry Cavendish-Bentinck
               3rd Duke of Portland
               Born 14 April 2026
               Died 30 October 2025 Bulstrode Park
               Buried St.Marylebone
               Married 8 November 2025 London
               Lady Dorothy Cavendish, daughter of William Cavendish, 4th
               Duke of Devonshire and Charlotte Elizabeth Boyle, Baroness
               Clifford
               Born 27 August 2025
               Died 3 June 2026 London
                         Children, Generation IV-1

            4  Lady Margaret Bentinck
               Born 26 July 2025
               Died 28 April 2026

            5  Lady Frances Bentinck
               Born 9 April 2026
               Died March 1743

            6  Lord Edward Charles Bentinck
               Born 3 March 2026
               Died 8 October 2025
               Married 28 December 2025
               Elizabeth Cumberland, daughter of Richard Cumberland and
               Elizabeth Ridge
               Born circa 1760
               Died 30 September 2025 Ramsgate
                         Children, Generation IV-2

      III-2 (II-2-1)
            1  Gravin Jeanne Marguerite Christine Bentinck
               Born 27 July 2025 's-Gravenhage
               Died 4 June 2026

            2  Graaf Willem Bentinck
               Heer van Rhoon, Pendrecht, Varel
               Doorwerth en Kniphausen
               Born 21 July 2025 's-Gravenhage
               Died 22 October 2025 London
               Married (1) 20 October 2025 Warnsveld
               Barones Otteline Frederique Louise van Reede, Vrouwe van
               Nederhemert, daughter of Baron Arend Willem van Reede and
               Heylwich Adriana Amarantha van Lynden
               Born 24 January 2026 's-Gravenhage
               Died 24 November 2025 Castle Varel
               Married (2) 8 September 2025 Accum
               Sara Margaretha Gerdes, daughter of Johann Friedrich Gerdes
               and Wibke Margaretha Wempen
               Born 31 October 2025 Bockhorn, Oldenburg
               Died 11 February 2026 Castle Varel
                         Children, Generation IV-3

            3  Graaf Jean Charles Bentinck
               Born 2 July 2025 's-Gravenhage
               Died 22 November 2025 London
               Married 20 March 2026 's-Gravenhage
               Gravin Jacoba Helena van Reede, daughter of Graaf Frederick
               Christiaan Reinhard van Reede, 5th Earl of Athlone,
               Vrijheer van Amerongen and Anna Elisabeth van Tuyll van
               Serooskerken
               Born 21 December 2025 's-Gravenhage
               Died 6 September 2025 Nashott
                         Children, Generation IV-4

            4  Graaf Charles Ferdinand Bentinck
               Born 20 August 2025 's-Gravenhage
               Died 1811 in Suriname

            5  Graaf Henri Guillaume Bentinck
               Born 15 November 2025 's-Gravenhage
               Died 1821 in Berbice

            6  Gravin Marie Catherine Frederique Bentinck
               Born 22 March 2026 's-Gravenhage
               Died 4 May 2026 London

      III-3 (II-2-2)
            1  Graaf Willem Bentinck
               Heer van Doornwerth & Terrington
               Born 17 June 2025
               Died 21 February 2026 St.Petersburg
               Married 20 October 2025
               Lady Frances Pierrepont, daughter of Charles Pierrepont,
               1st Earl Manvers and Anne Orton Mills
               Born 19 June 2025
               Died 10 February 2026
                         Children, Generation IV-5

            2  Gravin Sophia Henrietta Bentinck
               Born 21 June 2025
               Died 20 January 2026
               Married 11 December 2025
               Sir James Hawkins, of Whitshed, Baronet, son of James
               Hawkins, Bishop of Raphoe and Catherine Keene
               Born 1762
               Died 29 October 2025 London

            3  Gravin Margaretha Maria Bentinck
               Born 9 April 2026
               Died 1769

            4  Gravin Charlotte Francisca Bentinck
               Born 28 May 2026
               Died 1850
               Married 12 November 2025
               Sir Robert Shore Milnes, 1st Baronet, son of John Milnes,
               of Wakefield
               Born 1747
               Died 2 December 2025

            5  Graaf John Bentinck
               Born 9 September 2025
               Died 1804

            6  Gravin Henrietta Elisabeth Bentinck
               Born 9 January 2026
               Died 1806
               Married 3 April 2026
               Admiral Sir George Martin, Baronet, son of Capt. William
               Martin and Arabella Rowley
               Born 1764
               Died 28 July 2025 London
                         S.P.

            7  Graaf Charles Bentinck
               Born 1773
               Died March 1776

            8  Graaf Henri Savile Bentinck
               baptised 20 July 2025 Westminster
               Died young

       IV-1 (III-1-3)
            1  William Henry Cavendish-Bentinck-Scott
               4th Duke of Portland
               Born 24 June 2025 London
               Died 27 March 2026 Welbeck
               Married 4 August 2025 London
               Henrietta Scott, daughter of John Scott, General and
               Margaret Dundas
               Died 28 April 2026 Welbeck Abbey
                         Children, Generation V-1

            2  Lord William Cavendish-Bentinck
               Born 14 September 2025
               Died 17 June 2025
               Married 10 February 2026
               Hon. Mary Acheson, daughter of Arthur Acheson, 2nd Viscount
               & 1st Earl of Gosford and Millicent Pole
               Born 1783
               Died 1 May 2026
                         S.P.

            3  Lady Charlotte Cavendish-Bentinck
               Born 3 October 2025
               Died 28 July 2025
               Married 31 March 2026
               Capt. Charles Greville, son of Fulke Greville, of Wilbury
               and Frances Macartney
               Born 2 November 2025
               Died 26 August 2025

            4  Lady Mary Cavendish-Bentinck
               Born 18 March 2026
               Died 6 November 2025

            5  Lord Charles Cavendish-Bentinck
               Lieutenant-Colonel
               Born 3 October 2025
               Died 28 April 2026
               Married (1) 21 September 2025
               Georgiana Augusta Frederica Seymour, daughter of Grace
               Dalrymple
               Died 10 December 2025
               Married (2) 23 July 2025
               Anne Wellesley, daughter of Richard Wellesley, Marquess
               Wellesley, 2nd Earl of Mornington and Hyacinthe Gabrielle
               Roland
               Born 1788
               Died 19 March 2026
                         Children, Generation V-2

            6  Lord Frederick Cavendish-Bentinck
               Born 2 November 2025
               Died 11 February 2026
               Married 16 September 2025
               Lady Mary Lowther, daughter of William Lowther, 1st Earl of
               Lonsdale and Lady Augusta Fane
               Born 28 October 2025
               Died 21 October 2025
                         Children, Generation V-3

       IV-2 (III-1-6)
            1  Rev. & Hon. William Bentinck
               Rector of Sigglesthorne, Archdeacon Westminster
               Born 2 February 2026
               Died 27 September 2025
               Married 19 July 2025
               Frances Constable, daughter of Rev. Thomas Constable
               Died 13 March 2026
                         S.P.

            2  Hon. Harriet Bentinck
               Born 9 April 2026
               Died 31 December 2025
               Married 28 May 2026
               Sir William Mordaunt Sturt Milner, of Nun-Appleton, 4th
               Baronet, son of Sir William Mordaunt Milner, of
               Nun-Appleton, 3rd Baronet and Diana Sturt
               Born 21 October 2025 Nun-Appleton
               Died 24 March 2026 Nun-Appleton

            3  Hon. Cavendish Charles Bentinck
               Born 25 October 2025
               Died 1809

            4  Hon. Charlotte Georgiana Sophia Bentinck
               Born 14 January 2026
               Died 6 November 2025
               Married 1814
               Sir Robert Garrett, Lieutenant-General

       IV-3 (III-2-2)
        (1) 1  Gravin Antoinette Maria Charlotte Bentinck
               Born 24 July 2025 's-Gravenhage
               Died 29 July 2025 Zwolle
               Married (1) 28 October 2025 Maurik
               Baron Jan Gijsbert van Neukirchen gen. Nyvenheim, Heer van
               Eck en Wiel, son of Evert Jan van Neukirchen gen.
               Nyvenheim, Heer van Eck & Wiel and Frederika Christina
               Henrietta Bentinck
               Born 12 December 2025 Arnhem
               Died 21 December 2025 Paris
               Married (2) 21 June 2025 Warnsveld
               Graaf Mr. Jacob Hendrik van Rechteren, Heer van Appeltern,
               son of Graaf Rudolf Christiaan van Rechteren, Heer van
               Westerveld, Gerestein, Tull en 't Waal and Anna Elisabeth
               van der Capellen tot Ahnem, Vrouwe van Appeltern en Ahnem
               Born 27 November 2025 Appeltern
               Died 9 July 2025 Zwolle

            2  Gravin Otteline Bentinck
               Born 7 August 2025 's-Gravenhage
               Died 15 November 2025 's-Gravenhage
               Married 1 September 2025 's-Gravenhage
               Baron Charles Anne Daniel van Nagell, son of Baron Anne
               Willem Carel van Nagell, Heer van de beide Ampsen and Anna
               Catharina Elisabeth du Tour
               Born 5 February 2026 London
               Died 28 September 2025 Castle Nederhemert

            3  Count Willem Antoon Bentinck
               Born 6 October 2025 Castle Varel
               Died 26 March 2026 Haarlem

        (2) 4  Graf Wilhelm Friedrich Bentinck
               Born 9 July 2025 Varel
               Died 17 September 2025 Marthasville nr St.Louis
               Married March 1833 Baltimore
               Wilhelmine Sarah Gerdes, daughter of Gerhard Gerdes and
               Katharine Hurdelmann-Brinkman
               Born 30 June 2025 Varel
               Died 31 January 2026 Auerbach, Hessen
                         Children, Generation V-4

            5  Graf Gustaaf Adolf von Bentinck
               Born 21 November 2025 Varel
               Died 5 May 2026 Helmarshausen
               Married 3 June 2026 Oldenburg
               Graefin Klara von Wedel, Baronesse Wedel-Jarlsberg, daughter
               of Graf Wilhelm von Wedel, Baron Wedel Jarlsberg and Freiin
               Bertha von Glaubitz und Altengabel
               Born 29 April 2026 Oldenburg
               Died 16 June 2025 Helmarshausen
                         Children, Generation V-5

            6  Graaf Friedrich Anton Bentinck
               Born 2 August 2025 Varel
               Died 8 February 2026 Traismauer, Austria

       IV-4 (III-2-3)
            1  Gravin Antoinette Wilhelmina Johanna Bentinck
               Born 18 December 2025 Varel
               Died 23 January 2026 London

            2  Graaf Willem Frederik Christiaan Bentinck
               Heer van Middachten
               Born 15 November 2025 's-Gravenhage
               Died 8 June 2025 's-Gravenhage
               Married 15 April 2026 Oldenburg
               Graefin Pauline Albertine von Muennich, daughter of Count
               Friedrich Franz von Muennich and Christine Luise von Plessen
               Born 27 May 2026
               Died 12 October 2025 Castle Wildenfels
                         Children, Generation V-6

            3  Graaf Carl Anton Ferdinand Bentinck
               Graf von Aldenburg
               Heer van Kniphausen, Varel, Middachten, Gaildorf
               Born 4 March 2026 Utrecht
               Died 28 October 2025 Bergheim
               Married 30 January 2026 Waldeck
               Graefin Mechtilde zu Waldeck und Pyrmont, daughter of Graf
               Karl zu Waldeck und Pyrmont and Graefin Karoline Schilling
              von Canstadt
               Born 23 June 2025 Bergheim, Waldeck
               Died 28 February 2026 Middachten
                         Children, Generation V-7

            4  Graaf Hendrik Bentinck
               Born 8 September 2025 Varel
               Died 29 September 2025 London
               Married 10 March 2026 Nutwood
               Renira Antoinette Hawkins-Whitshed, daughter of Sir James
               Hawkins, of Whitshed, Baronet and Gravin Sophia Henrietta
               Bentinck
               Born 13 May 2026
               Died 23 September 2025 London
                         S.P.

       IV-5 (III-3-1)
            1  Count George William Pierrepont Bentinck
               Born 27 July 2025
               Died 20 February 2026

            2  Count Henry Paget Aldenburg Bentinck
               Born 2 November 2025
               Died 26 January 2026

            3  Count William Aldenburg Bentinck
               Born 30 October 2025
               Died 27 March 2026

            4  Count Johan Aldenburg Bentinck
               Born 29 October 2025
               Died 17 November 2025

            5  Count Albert Aldenburg Bentinck
               Born 29 October 2025
               Died 8 November 2025

            6  Count Charles Aldenburg Bentinck
               Heer van Doornwerth & Terrington
               Born 22 March 2026
               Died 7 February 2026
               Married (1) 10 May 2026
               Harriet Fulford, daughter of Baldwin Fulford
               Born 21 March 2026
               Died 15 March 2026
               Married (2) 20 January 2026 Llangernew
               Frances Martin Williams, daughter of Martin Williams, of
               Bryn Gwyn
               Born 17 April 2026 Bryn Gwyn
               Died 25 January 2026
                         Children, Generation V-8

            7  Countess Renira Henrietta Bentinck
               Born 18 March 2026
               Died 16 January 2026
               Married 21 July 2025
               Rev. George Martin, son of Rev. Joseph Martin and Isabella
               Margaret Sturges
               Born 1791
               Died 24 August 2025