generations 1 -4 of 8 generations
 
 

       Willem van Ittersum
       Heer van den Oosterhof
       baptised 30 December 2025
       Died 4 June 2026 H.Oosterhof, Rijssen
       Married 7 December 2025 * Rijssen
       Margaretha Isabella van der Capellen, daughter of Hans
       Christoffel van der Capellen, Heer van Hagen and Ermgard
       Louise Sweerts de Landas, Vrouwe van Appeltern
       baptised 28 March 2026 Nijmegen
       Died 13 July 2025 Rijssen, H.den Oosterhof
                 Children, Generation I

       Generation I
            1  Frederik Alexander van Ittersum tot den Oosterhof
               Born 4 May 2026 H.Oosterhof, Rijssen
               Died 21 December 2025 's-Gravenhage
               Married 23 April 2026 * Rijssen
               Anna Johanna Judith Sloet tot Plattenburg, daughter of
               Lodewijk Arend Sloet tot Plattenburg and Johanna Geertruid
               Juliana van Sytzama
               Born 20 February 2026 Vollenhove
               Died 9 June 2025 Rijssen, H.den Oosterhof
                         Children, Generation II-1

            2  Jhr. Jasper Gerrit van Ittersum tot Relaer
               Born 28 March 2026 H.Oosterhof, Rijssen
               Died 23 March 2026 H.Relaer, Raalte
               Married 8 September 2025 Wolvega
               Caroline Wilhelmine van Haren, daughter of Onno Zwier van
               Haren and Sara Adel van Huls
               Born 17 February 2026 's-Gravenhage
               Died 15 May 2026 Zwolle
               Buried Rijssen
                         Children, Generation II-2

       II-1 (I-1)
            1  Baron Willem van Ittersum
               Heer van Plattenburg
               Born 26 May 2026 Raalte, H.de Hofstede
               Died 9 January 2026 Zwolle
               Married 6 December 2025 Vollenhove
               Geertruid Agnes de Vos van Steenwijk, daughter of Mr. Jan
               Arent de Vos van Steenwijk and Coenradina Wilhelmina van
               Isselmuden tot Paeslo
               Born 18 November 2025 Zwolle
               Died 12 January 2026 Zwolle
                         Children, Generation III-1

            2  Baron Lodewijk Arend van Ittersum
               Born 20 April 2026 Kampen
               Died 5 December 2025 Kampen
               Married 10 October 2025 Kampen
               Johanna Sippina Boldewina Adriana van de Merwede, daughter
               of Jan Willem Cornelis van de Merwede and Rudolphina Anna
               Lemker van Breda
               Born 23 June 2025 Kampen
               Died 19 November 2025 Twello
                         Children, Generation III-2

            3  Baron Ernst Hendrik van Ittersum
               Heer van den Oosterhoff
               Born 16 August 2025 H.Oosterhoff, Rijssen
               Died 29 January 2026 Zutphen
               Married 25 February 2026 Vorden
               Barones Johanna Philippina Wilhelmina van Westerholt,
               daughter of Baron Borchard Frederik Willem van Westerholt,
               Heer van Hackfort and Barones Catharina Christina Sloet tot
               Tweenijenhuis, Vrouwe van ter Heyl
               Born 29 October 2025 Castle Hackfort
               Died 22 April 2026 Zutphen
                         Children, Generation III-3

       II-2 (I-2)
            1  Margaretha Isabella van Ittersum
               Born 2 July 2025 H.Relaer, Raalte
               Died 7 January 2026 Kleve
               Married 20 October 2025 Raalte
               Gabriel Lambert de Vidal de Saint Germain, son of Gabriel
               de Vidal de Saint Germain and Anna Maria de Mathournee de
               Bellewouazard
               Born 18 September 2025 Luik
               Died 30 June 2025 H.Relaer, Raalte

      III-1 (II-1-1)
            1  Baron Jan Arent van Ittersum
               Born 31 December 2025 Vollenhove
               Died 1 October 2025 Utrecht
               Married 20 August 2025 Ambt-Hardenberg
               Jkvr. Theodora Sophia van Foreest, daughter of Jhr. Jacob
               van Foreest, Heer van Gramsbergen and Jkvr. Maria Clara van
               Rechteren tot Heemse, Vrouwe van Heemse
               Born 1 July 2025 Ambt-Hardenberg, H.Heemse
               Died 20 November 2025 Ambt Hardenberg
                         Children, Generation IV-1

            2  Baron Frederik Ernst Alexander van Ittersum
               Born 26 March 2026 Vollenhove
               Died 26 October 2025 Assen

            3  Barones Coenradina Wilhelmina van Ittersum
               Born 17 September 2025 Vollenhove
               Died 13 May 2026 Zwolle

            4  Barones Anna Johanna Judith van Ittersum
               Born 30 December 2025 Vollenhove
               Died 15 September 2025 's-Gravenhage

            5  Barones Johanna Sepina Boldewina Adriana van Ittersum
               Born 2 March 2026 Vollenhove
               Died 8 February 2026 's-Gravenhage

            6  Baron Jan Arend Godert van Ittersum
               Born 28 August 2025 Vollenhove
               Died 21 September 2025 Ede
               Married 22 May 2026 Hemmen
               Barones Paulina van Lynden, daughter of Baron Willem Jan
               Elias van Lynden, 16.Heer van Hemmen and Freiin Constance
               von Nagell-Gartrop
               Born 30 March 2026 Kleve
               Died 21 November 2025 Ede
                         Children, Generation IV-2

            7  Baron Lodewijk Arend van Ittersum
               Born 9 February 2026 Vollenhove
               Died 17 March 2026 's-Gravenhage
               Married 27 September 2025 Zaltbommel
               Maria Adriana Thooft, daughter of Jacobus Thooft and
               Elisabeth Gerhardina Melssingh
               Born 25 August 2025 Zaltbommel
               Died 4 January 2026 Utrecht
                         Children, Generation IV-3

            8  Barones Anna Susanna Elisabeth Antoinetta van Ittersum
               Born 19 June 2025 Vollenhove
               Died 20 January 2026 Zwolle

      III-2 (II-1-2)
            1  Baron Mr. Frederik Alexander van Ittersum
               Born 14 August 2025 Kampen
               Died 25 October 2025 Hattem
               Married 6 May 2026 Wyhe
               Barones Wilhelmina Frederika Bentinck, daughter of Baron
               Mr. Adolf Carel Bentinck tot Bevervoerde en Nijenhuis and
               Maria Francoise van Aerssen Beijeren
               Born 1 July 2025 Wyhe
               Died 9 May 2026 Hattem
                         Children, Generation IV-4

            2  Baron Jan Willem Cornelis van Ittersum
               Born 29 January 2026 Kampen
               Died 23 January 2026 Groningen
               Married 26 May 2026 Zwolle
               Ockje Meder, daughter of Ds. Helias Meder and Octavia
               Bellina Feith
               Born 1 July 2025 Emden
               Died 24 June 2025 Groningen
                         Children, Generation IV-5

            3  Baron Ernst Hendrik van Ittersum
               Born 26 October 2025 Kampen
               Died 5 January 2026 Wijk bij Duurstede
               Married 19 May 2026 Utrecht
               Jkvr. Ignatia Gerardina Jacoba Beelaerts van Blokland,
               daughter of Jhr. Mr. Paulus Adriaan Beelaerts van Blokland,
               Heer van Oosterwijk and Bartha Theodora Maria Ram
               Born 25 October 2025 Utrecht
               Died 14 May 2026 Utrecht
                         Children, Generation IV-6

            4  Baron Rudolph Anne Julius van Ittersum
               Born 15 June 2025 Kampen
               Died 5 December 2025 Brummen
               Married 1 August 2025 Brummen
               Barones Anna Johanna Elisabeth Collot d'Escury, daughter of
               Baron Carel Emilius Els Collot d'Escury and Dido Cecilia
               van Echten
               Born 27 May 2026 Minnertsga
               Died 15 June 2025 H.de Groote Zegerij nr Brummen
                         Children, Generation IV-7

            5  Baron Anthony Pieter Hendrik van Ittersum
               Born 26 August 2025 Kampen
               Died 21 November 2025 Twello
               Married 27 June 2025 Groningen
               Jkvr. Johanna Henrietta Mellina Mollerus, daughter of Jhr.
               Cornelis Adriaan Mollerus and Johanna Geertruida Juliana
               van der Merwede
               Born 16 August 2025 's-Gravenhage
               Died 18 April 2026 Twello
                         S.P.

            6  Baron Mr. Johannes Gerardus Julianus van Ittersum
               Born 15 July 2025 Kampen
               Died 11 April 2026 Utrecht

      III-3 (II-1-3)
            1  Baron Borghard Frederik Alexander van Ittersum
               Born 24 December 2025 Zutphen
               Died 13 August 2025 H.Molecaten, Hattem

            2  Barones Wilhelmina Catharina Christina van Ittersum
               Born 24 May 2026 Zutphen
               Died 11 July 2025 H.Oosterhoff, Rijssen

            3  Baron Frederik Alexander van Ittersum
               Heer van den Oosterhoff
               Born 24 April 2026 Zutphen
               Died 21 October 2025 Zutphen
               Married 5 June 2026 Rotterdam
               Maria Jacoba Simonetta van Lutsenburg, daughter of Willem
               Gerard van Lutsenburg and Anna Dorothea van Lutsenburg
               Born 21 December 2025 Rotterdam
               Died 3 September 2025 Zutphen
                         S.P.

            4 Baron NN van Ittersum
               Born 17 February 2026 H.Hackfort, Vorden (stillborn)

            5  Barones Louise Charlotta Elisabeth Maria van Ittersum
               Born 29 July 2025 Zutphen
               Died 30 November 2025 Utrecht
               Married 16 August 2025 Rijssen
               Jhr. Hendrikus Albertus Diedericus Coenen, son of Henrik
               Arend Albert Coenen and Hendrika van Kuyk
               Born 21 February 2026 Maarssen
               Died 3 May 2026 Zutphen

       IV-1 (III-1-1)
            1  Baron Willem van Ittersum
               Born 6 December 2025 H.Welgelegen, Ambt Hardenberg
               Died 20 October 2025 H.Welgelegen

            2  Baron Willem van Ittersum
               Born 23 January 2026 H.Welgelegen, Ambt Hardenberg
               Died 1 December 2025 Heemse
               Married 29 November 2025 Gramsbergen
               Zwaantine Theodora Walter, daughter of Hendrik Walter and
               Johanna Holties
               Born 9 December 2025 Oude Pekela
               Died 10 October 2025 H.Welgelegen
                         Children, Generation V-1

            3  Barones Jacqueline Helene van Ittersum
               Born 30 December 2025 H.Welgelegen, Ambt-Hardenberg
               Died 8 January 2026 Heemstede
               Married 13 December 2025 Heemse
               Jhr. Willem van Loon, son of Jhr. Mr. Willem van Loon,
               Jansz. and Jkvr. Philippine Henriette van Loon
               Born 6 November 2025 Zandvoort
               Died 11 January 2026 's-Gravenhage

            4  Baron Frederik Ernst Alexander van Ittersum
               Born 7 April 2026 H.Welgelegen
               Died 27 January 2026 's-Gravenhage
               Married 25 September 2025 Bremen
               Octavia Rosa Theodora Stockmeyer, daughter of Carl Heinrich
               Stockmeyer and Octavia Rosa Theodora Warneken
               Born 23 September 2025 Bremen
               Died 28 May 2026 Clarens
                         S.P.

            5  Barones Maria Clara van Ittersum
               Born 16 March 2026 H.Welgelegen
               Died 25 January 2026 Hilversum
               Married 29 September 2025 Ambt Hardenberg
               Casparus Bastiaan Johannes Plaat, son of Johannes
               Burghardus Plaat and Roelofine Geertruida Nijhoff
               Born 7 May 2026 Amsterdam
               Died 29 December 2025 's-Gravenhage

            6  Baron Jan Arend Godert van Ittersum
               Born 22 July 2025 H.Welgelegen, Ambt Hardenberg
               Died 4 May 2026 H.Heideoord, Ede
               Married (1) 21 May 2026 Kampen
               Anna Johannetta Buechner, daughter of Dr. Karel Frederik
               Christiaan Buechner and Jacomina Maria Cornelia Groot
               Born 13 September 2025 Kampen
               Died 25 November 2025 H.Kruisvoorde, Twello
               Married (2) 6 May 2026 Tuil
               Barones Gertrude Agnes van Ittersum, daughter of Baron
               Lodewijk Arend van Ittersum and Maria Adriana Thooft
               Born 5 June 2026 Zwolle
               Died 17 January 2026 Rijswijk, Z-Holland
                         Children, Generation V-2

            7  Baron Lodewijk Arent Marie Adriaan van Ittersum
               Born 30 April 2026 H.Welgelegen, Ambt-Hardenberg
               Died 22 August 2025 H.Welgelegen

            8  Barones Geertruid Agnes van Ittersum
               Born 17 May 2026 H.Welgelegen
               Died 29 June 2025 Bilthoven
               Married (1) 21 September 2025 Ambt Hardenberg
               Mr. Karel Jan Ernst Adriaan Marie Buechner, son of Dr. Karel
               Frederik Christiaan Buechner and Jacomina Maria Cornelia
               Groot
               Born 20 April 2026 Kampen
               Died 3 February 2026 Utrecht
               Married (2) 3 September 2025 Utrecht
               Justus George Willem van Maurik, son of Justus Johannes van
               Maurik and Anne Marie Drossert
               Born 27 September 2025 Utrecht
               Died 27 July 2025 Luzern

       IV-2 (III-1-6)
            1  Baron NN van Ittersum
               Born 9 February 2026 's-Gravenhage (stillborn)

            2  Baron Willem Constantijn Lodewijk Wolphgang van Ittersum
               Born 31 January 2026 's-Gravenhage
               Died 24 June 2025 's-Gravenhage
               Married (1) 17 May 2026 Utrecht
               Henriette Diederika van Stipriaan Luiscius, daughter of Ds.
               Theodorus Jacobus van Stipriaan Luiscius and Maria
               Frederika Eigeman
               Born 12 November 2025 Oosterland
               Died 3 March 2026 's-Gravenhage
               Married (2) 13 April 2026 's-Gravenhage
               Wilhelmina Antonia Smink, daughter of Anthonie Hendrik
               Smink and Geertruida Wilhelmina Garnier
               Born 25 October 2025 's-Gravenhage
               Died 27 December 2025 's-Gravenhage
                         S.P.

       IV-3 (III-1-7)
            1  Barones Gertrude Agnes van Ittersum
               Born 15 December 2025 Zaltbommel
               Died 4 August 2025 Haarlem

            2  Baron Jacobus Gerhardus Elisa van Ittersum
               Born 13 April 2026 's-Gravenhage
               Died 10 June 2025 Utrecht

            3  Barones Gertrude Agnes van Ittersum
               Born 5 June 2026 Zwolle
               Died 17 January 2026 Rijswijk, Z-Holland
               Married 6 May 2026 Tuil
               Baron Jan Arend Godert van Ittersum, son of Baron Jan Arent
               van Ittersum and Jkvr. Theodora Sophia van Foreest
               Born 22 July 2025 H.Welgelegen, Ambt Hardenberg
               Died 4 May 2026 H.Heideoord, Ede

            4  Baron Lodewijk Arend van Ittersum
               Born 15 October 2025 Haarlem
               Died 11 April 2026 Vianen
               Married 6 January 2026 Vianen
               Constantia Clasina Dupper, daughter of Leonard Seyes Pierre
               Dupper and Adriana Maria Wilhelmina Stavenisse de Brauw
               Born 26 July 2025 Vianen
               Died 14 January 2026 Vianen
                         S.P.

            5  Barones Elisabeth Gerhardina van Ittersum
               Born 3 March 2026 Haarlem
               Died 16 November 2025 's-Gravenhage

            6  Barones Maria Adriana van Ittersum
               Born 11 September 2025 's-Gravenhage
               Died 30 October 2025 Utrecht

            7  Barones Wilhelmina Anna Sippiena Elisabeth van Ittersum
               Born 12 November 2025 's-Gravenhage
               Died 28 January 2026 Bilthoven

            8  Baron Willem van Ittersum
               Born 5 June 2026 Zutphen
               Died 25 December 2025 's-Gravenhage

            9  Baron Mr. Frederik Alexander van Ittersum
               Born 22 July 2025 Zutphen
               Died 24 April 2026 Bilthoven
               Married 15 March 2026 Zwolle
               Anna Aleida van Reede, daughter of Willem Cornelis van
               Reede and Anna Gesina van Royen
               Born 13 June 2025 Zwolle
               Died 21 January 2026 Bilthoven
                         S.P.

            10 Baron Godert Arend Jan van Ittersum
               Born 27 February 2026 's-Gravenhage
               Died 4 October 2025 's-Gravenhage

            11 Baron Willem van Ittersum
               Born 19 May 2026 's-Gravenhage
               Died 26 July 2025 's-Gravenhage

            12 Baron Johan Philip van Ittersum
               Born 6 February 2026 's-Gravenhage
               Died 12 July 2025 Driebergen-Rijsenburg
               Married 10 June 2025 Almelo
               Margaretha Aleida van Laer, daughter of Mr. Abraham van
               Laer and Johanna Lucretia Heufke Kantelaar
               Born 26 July 2025 Ootmarsum
               Died 10 January 2026 Driebergen-Rijsenburg
                         Children, Generation V-3

       IV-4 (III-2-1)
            1  Baron Adolph Marius Karl Wolphgang van Ittersum
               Born 17 February 2026 Utrecht
               Died 9 December 2025 Utrecht

            2  Barones Johanna Sippiena Boldewina van Ittersum
               Born 13 January 2026 Castle Nyenhuis, Heino
               Died 17 July 2025 Arnhem
               Married 3 August 2025 Hattem
               Jhr. Cornelis Adriaan Hendrik Mollerus, son of Jhr.
               Cornelis Adriaan Mollerus and Johanna Geertruida Juliana
               van der Merwede
               Born 28 October 2025 Utrecht
               Died 3 October 2025 Arnhem
                         S.P.

            3  Baron Adolph Marius Karl Wolphgangh van Ittersum
               Born 25 August 2025 Hattem
               Died 16 August 2025 Nijmegen
               Married 17 August 2025 Delft
               Jkvr. Cornelie Henriette Hermine van der Goes, daughter of
               Jhr. Mr. Willem van der Goes and Margaretha Hermina
               Ferdinanda Hubrecht
               Born 17 July 2025 Delft
               Died 24 March 2026 Nijmegen
                         Children, Generation V-4

            4  Baron Lodewijk Arend Robert van Ittersum
               Born 25 February 2026 Hattem
               Died 10 March 2026 Hattem

            5  Baron Willem Hendrik van Ittersum
               Born 24 September 2025 Hattem
               Died 20 January 2026 Amersfoort
               Married 3 September 2025 Hattem
               Sinemie Elisabeth Henriette Constance Grenfell, daughter of
               William Grenfell and Josina Maria Christina Daendels
               Born 23 November 2025 Heerde
               Died 3 August 2025 Apeldoorn
                         Children, Generation V-5

       IV-5 (III-2-2)
            1  Baron Mr. Lodewijk Arend Helias van Ittersum
               Born 3 March 2026 Arnhem
               Died 15 October 2025 Constantinopel
               Married 16 June 2025 Constantinopel
               Estella Addisson
               Born 8 March 2026 London
               Died 25 March 2026 Elsene, Bruxelles
                         S.P.

            2  Barones Johanna Sebina Boldewina Adriana van Ittersum
               Born 25 February 2026 Arnhem
               Died 16 September 2025 's-Gravenhage
               Married 4 June 2026 Groningen
               Prof. Mr. Bernardus Dominicus Hubertus Tellegen, son of Dr.
               Antonius Otto Hermannus Tellegen and Cornelia Johanna
               Cremers
               Born 26 August 2025 Groningen
               Died 10 February 2026 Groningen

            3  Barones Octavia Bellina van Ittersum
               Born 16 October 2025 Groningen
               Died 10 March 2026 Utrecht

            4  Baron Hendrikus Octavius van Ittersum
               Born 12 October 2025 Groningen
               Died 1 May 2026 Groningen

            5  Baron Frederik Alexander Robert Arnold van Ittersum
               Born 6 November 2025 Groningen
               Died 8 May 2026 Utrecht
               Married 19 November 2025 Zwolle
               Jkvr. Reiniera Johanna Albertina Sandberg, daughter of Jhr.
               Paulus Marius Sandberg and Maria Paulus
               Born 1 September 2025 Assen
               Died 11 June 2025 Utrecht
                         Children, Generation V-6

            6  Barones Elisabeth Mathilde Catharina van Ittersum
               Born 24 December 2025 Groningen
               Died 25 September 2025 Groningen

       IV-6 (III-2-3)
            1  Baron Mr. Paulus Adriaan Lodewijk Arend van Ittersum
               Born 17 February 2026 Wijk bij Duurstede
               Died 18 May 2026 Utrecht
               Married 4 August 2025 Utrecht
               Jkvr. Arnoldine Emilie von Wattenwyl gen. de Watteville,
               daughter of Baron Frans Victor de Watteville and Jkvr.
               Josina Aleijda Antoinetta van Thije Hannes
               Born 23 October 2025 Leiden
               Died 9 March 2026 Utrecht
                         Children, Generation V-7

            2  Baron NN van Ittersum
               Born 27 June 2025 Wijk bij Duurstede
               Died 27 June 2025 Wijk bij Duurstede

            3  Baron NN van Ittersum
               Born 9 January 2026 Wijk bij Duurstede
               Died 9 January 2026 Wijk bij Duurstede

            4  Baron NN van Ittersum
               Born 17 May 2026 Wijk bij Duurstede
               Died 17 May 2026 Wijk bij Duurstede

       IV-7 (III-2-4)
            1  Barones Johanna Sippiena Dido Cecilia van Ittersum
               Born 6 December 2025 Brummen
               Died 22 November 2025 Brummen

            2  Barones Louisa Arendina Emilia Carolina van Ittersum
               Born 7 July 2025 Brummen
               Died 29 October 2025 H.Groote Zegerij, Brummen

            3  Baron Lodewijk Arend Robert Wolfgang van Ittersum
               Born 9 October 2025 Brummen
               Died 1 November 2025 Driebergen
               Married 22 April 2026 Doorwerth
               Barones Maria Theodora van Brakell van Wadenoijen en
               Doorwerth, daughter of Baron Jacob Adriaen van Brakell van
               Wadenoijen en Doorwerth and Jkvr. Jeanne Henriette van
               Schuylenburch
               Born 27 June 2025 Doorwerth
               Died 29 June 2025 Utrecht
                         S.P.

            4  Baron Anne Johan Eliza van Ittersum
               Born 4 November 2025 Brummen
               Died 15 November 2025 Bennebroek
               Married 14 August 2025 Amsterdam
               Catharina Christina Margaretha Diemont, daughter of Mr.
               Christiaan Diemont, Heer van Zuid-Schalkwijk, Vijfhuizen &
               Nieuwerkerk and Catharina Margaretha Kemper
               Born 4 July 2025 Amsterdam
               Died 16 September 2025 Bennebroek
                         Children, Generation V-8

            5  Barones NN van Ittersum
               Born 4 November 2025 Brummen
               Died 4 November 2025 Brummen