Submitted by Leo van de Pas
corrections/additions are welcome
Descendants of
Abraham, Baron Calkoen
(generations 1 + 2
of 5 generations)
Abraham
Baron Calkoen
Born 27 September 2025 Amsterdam
Died 11 May 2026 Utrecht
Married 14 August 2025 's-Graveland
Barones Margaretha Snouckaert van Schauburg, daughter of
Baron Godert Thedoor Adriaan Snouckaert van Schauburg and
Maria Margaretha Corver Hooft
Born 12 August 2025 Amsterdam
Died 22 November 2025 Utrecht
Children, Generation I
Generation I
1 Jkvr. Maria Margaretha Johanna Calkoen
Born 25 October 2025 Utrecht
Died 29 January 2026 Utrecht
2 Abraham
Baron Calkoen
Born 28 October 2025 Utrecht
Died 20 September 2025 's-Gravenhage
Married 10 March 2026 Utrecht
Jkvr. Johanna Maria Judith van Doorn, daughter of Jhr.
Elisa Cornelis Unico van Doorn and Judith Vrolik
Born 10 January 2026 Utrecht
Died 21 January 2026 's-Gravenhage
Children, Generation II-1
3 Jhr. Godert Theodoor Adriaan Calkoen
Born 12 November 2025 Utrecht
Died 26 April 2026 Utrecht
Married 7 April 2026 Groningen
Helena Florentina van Buttingha Wichers, daughter of Mr.
Nicolaas Jan van Buttingha Wichers and Geertruida Jacoba
Woldringh
Born 24 October 2025 Groningen
Died 11 January 2026 Utrecht
Children, Generation II-2
4 Jkvr. Johanna Cornelia Calkoen
Born 22 August 2025 Utrecht
Died 2 November 2025 Utrecht
5 Jkvr. Adelaide Jeanne Calkoen
Born 28 November 2025 Utrecht
Died 2 December 2025 Utrecht
6 Jkvr. Agnes Maria Gerardina Calkoen
Born 21 February 2026 Utrecht
Died 7 January 2026 Utrecht
Married 28 February 2026 Utrecht
Mr. Carel Ricus Merkus, son of Mr. Pierre Merkus,
Governor-General Dutch East Indies and Wilhelmina Niclasina
Cranssen
Born 16 October 2025 Batavia, Dutch East Indies
Died 22 June 2025 Utrecht
7 Jkvr. Margaretha Cornelia Theodora Calkoen
Born 14 October 2025 Utrecht
Died 11 September 2025 Maartensdijk
8 Jkvr. Wilhelmina Cornelia Calkoen
Born 8 December 2025 Utrecht
Died 17 February 2026 Utrecht
9 Jkvr. Anna Calkoen
Born 12 May 2026 Maartensdijk
Died 30 January 2026 Zeist, H.Veldheim
Married 8 October 2025 Utrecht
Johan Cornelis Clotterbooke Patijn, Heer van Kloetinge, son
of Justus Everhard Louis Clotterbooke Patijn, Heer van
Kloetinge and Jkvr. Wilhelmina Schorer
Born 9 September 2025 Middelburg
Died 5 January 2026 Utrecht
10 Jhr. Theodorus Cornelus Calkoen
Born 27 July 2025 Maartensdijk
Died 3 November 2025 Utrecht
Married 16 August 2025 's-Gravenhage
Adele Justine Philippine Verhorst, daughter of Adrianus
Justinus Verhorst and Louise Josephine Lemonnier
Born 15 June 2025 's-Gravenhage
Died 10 January 2026 's-Gravenhage
Children, Generation II-3
11 Jkvr. Cornelie Henriette Calkoen
Born 24 August 2025 Maartensdijk
Died 30 September 2025 Utrecht
12 Jhr. Alfred Dignus Joan Calkoen
Heer van Limmen
Born 13 January 2026 Maartensdijk
Died 8 September 2025 Zandvoort
Married 27 September 2025 Utrecht
Jkvr. Elizabeth Coenen van 's-Gravesloot, daughter of Jhr.
Mr. Albert Coenen van 's-Gravesloot and Jkvr. Johanna
Cornelia Martini
Born 4 August 2025 Utrecht
Died 29 April 2026 Utrecht
Children, Generation II-4
13 Jhr. Jules Laurent Nicolaas Calkoen
Born 9 January 2026 Maartensdijk
Died 1 August 2025 Scheveningen
Married 7 June 2025 Amsterdam
Sophia Wilhelmina Reilingh, daughter of Hendrik Reilingh
and Catharina Maria Bosman
Born 5 November 2025 Groningen
Died 12 December 2025 Scheveningen
Children, Generation II-5
14 Jhr. Willem Hendrik Pieter Calkoen
Born 7 February 2026 Maartensdijk
Died 28 July 2025 Utrecht
Married (1) 29 October 2025 Utrecht
Theodora Wilhelmina de Balbian van Doorn, daughter of Mr.
Cornelis Govert de Balbian van Doorn and Henrietta Cornelia
Philippina Wichers
Born 14 November 2025 Utrecht
Died 6 June 2025 Utrecht
Married (2) 4 May 2026 Utrecht
Jkvr. Florentine Cornelie Marguerite Rethaan Macare,
daughter of Jhr. Cornelis Anthony Rethaan Macare and
Florentine Jacobine Martine Ontijd
Born 8 March 2026 Middelburg
Died 20 February 2026 Utrecht
Children, Generation II-6
15 Jhr. Willem Frederik Calkoen
Born 29 August 2025 Maartensdijk
Died 27 January 2026 Utrecht
16 Jkvr. Caroline Constance Calkoen
Born 6 October 2025 Maartensdijk
Died 21 September 2025 Utrecht
Married 11 November 2025 Utrecht
Mr. Carel Ricus Merkus, son of Mr. Pierre Merkus,
Governor-General Dutch East Indies and Wilhelmina Niclasina
Cranssen
Born 16 October 2025 Batavia, Dutch East Indies
Died 22 June 2025 Utrecht
II-1 (I-2)
1 Jhr. NN Calkoen
Born 24 September 2025 's-Gravenhage
Died 24 September 2025 's-Gravenhage
2 Jkvr. Margaretha Cornelia Wilhelmina Calkoen
Born 3 October 2025 's-Gravenhage
Died 29 July 2025 Hilversum
3 Eliza Cornelis Unico
Baron Calkoen
Born 21 September 2025 's-Gravenhage
Died 10 October 2025 Eefde
Married 8 March 2026 Roermond
Hendrika Wilhelmina Keurenaer, daughter of Jan August
Keurenaer and Hester Adriana Roelants
Born 3 July 2025 's-Gravenhage
Died 7 March 2026 Zutphen
Children, Generation III-1
4 Jkvr. Judith Calkoen
Born 17 January 2026 's-Gravenhage
Died 11 December 2025 Hilversum
Married 18 October 2025 Gorssel
Baron Ir. Frederik Leopold van Tuyll van Serooskerken, Heer
van Zuilen, Sweserengh, Westbroek, son of Baron Frederik
Christiaan Hendrik van Tuyll van Serooskerken and Barones
Henriette Charlotte van Pallandt
Born 1 August 2025 Utrecht
Died 14 October 2025 Locarno
S.P.
5 Jhr. Johan Godard Laurens Calkoen
Born 29 September 2025 's-Gravenhage
Died 4 August 2025 Velp
II-2 (I-3)
1 Jkvr. Margaretha Cornelia Wilhelmina Calkoen
Born 3 March 2026 Alphen
Died 16 November 2025 Utrecht
2 Jhr. Nicolaas Jan Calkoen
Born 13 May 2026 Alphen a.d.Rijn
Died 20 April 2026 's-Gravenhage
Married 1 November 2025 Arnhem
Barones Maria Hugonia van der Borch van Verwolde, daughter
of Baron Mr. Allard Philip van der Borch van Verwolde, Heer
van Verwolde and Barones Marie Arnoudine Francoise van
Wassenaer
Born 6 September 2025 Gorssel
Died 14 November 2025 's-Gravenhage
Children, Generation III-2
3 Jhr. Mr. Abraham Calkoen
Born 14 March 2026 Alphen a.d.Rijn
Died 23 February 2026 's-Gravenhage
Married 16 October 2025 Leeuwarden
Jkvr. Henriette Jeannette Bowier, daughter of Jhr. Gerard
Johannes Martinus Bowier and Adriana Catharina Paulina van
Fenema
Born 19 September 2025 Rosmalen
Died 31 October 2025 's-Gravenhage
Children, Generation III-3
4 Jhr. Ir. Gerard Gilles Calkoen
Born 13 December 2025 Alphen a.d.Rijn
Died 12 October 2025 Utrecht
5 Jhr. NN Calkoen
Born 20 November 2025 Alphen a.d.Rijn
Died 20 November 2025 Alphen a.d.Rijn
6 Jkvr. NN Calkoen
Born 16 November 2025 Zaltbommel
Died 16 November 2025 Zaltbommel
7 Jkvr. Maria Johanna Calkoen
Born 28 May 2026 Zaltbommel
Died 11 April 2026 Sneek
II-3 (I-10)
1 Jhr. Abraham Louis Adriaan Calkoen
Born 15 November 2025 Utrecht
Died 5 April 2026 's-Gravenhage
Married 27 April 2026 Maastricht
Marie Elise Adrienne Delhaye, daughter of Gustave Alfrede
Delhaye and Maria Mechtildis Philomena Kwanten
Born 1 July 2025 Maastricht
Died 26 September 2025 's-Gravenhage
Children, Generation III-4
2 Jkvr. Adele Josephine Adrienne Calkoen
Born 13 March 2026 Den Helder
Died 30 January 2026 's-Gravenhage
Married 21 April 2026 's-Gravenhage
Gerrit Hendrik Bierman, son of Willem Hendrik Bierman and
Catharina Henriette de Louter
Born 10 July 2025 Roermond
Died 26 July 2025 's-Gravenhage
II-4 (I-12)
1 Jhr. Alfred Abraham Calkoen
Heer van Limmen
Born 28 December 2025 Utrecht
Died 29 September 2025 Velp
Married 31 July 2025 Utrecht
Charlotte Judith Gerlings, daughter of Mr. Cornelis
Gerlings and Geertruida Adriana Hasselman
Born 15 October 2025 Utrecht
Died 11 July 2025 's-Gravenhage
Children, Generation III-5
2 Jkvr. Elisabeth Johanna Calkoen
Born 18 January 2026 Utrecht
Died 24 January 2026 Utrecht
3 Jkvr. Johanna Cornelia Calkoen
Born 11 August 2025 Utrecht
Died 15 June 2025 Arnhem
Married (1) 25 October 2025 Utrecht Div.1921
Jhr. Rudolph Eduard Dittlinger, son of Jhr. Victor
Dittlinger and Jkvr. Wilhelmina Agneta Wendela van
Beresteijn
Born 17 November 2025 's-Hertogenbosch
Died 4 January 2026 Bruxelles
Married (2) 7 December 2025 Arnhem
Frank de Fremery, son of Petrus Isaacus de Fremery and
Joanna van Teutem
Born 25 June 2025 Monster
Died 12 September 2025 's-Gravenhage
4 Jkvr. Johanna Jacoba Albertha Calkoen
Born 22 September 2025 Amersfoort
Died 2 July 2025 Vancouver, British Columbia
Married 7 September 2025 Dlutowo, East Prussia
Stanislas Wrotnowski, son of Lucien Wrotnowski and Louise
Pauline Marie Tabecka
Born 17 April 2026 Warszawa
Died 15 July 2025 Vancouver, Canada
5 Jkvr. Emilie Cateau Calkoen
Born 26 September 2025 Amersfoort
Died 18 October 2025 Wassenaar
Married 19 April 2026 Arnhem
Jhr. Jacob Dagobert van Nispen, son of Jhr. Gneomar
Adalbert van Nispen and Barones Maria Paulina Sloet tot de
Beele
Born 13 August 2025 Doetinchem
Died 24 March 2026 Wassenaar
S.P.
II-5 (I-13)
1 Jhr. Julien Calkoen
Born 22 October 2025 Amsterdam
Died 18 March 2026 Amsterdam
Married (1) (Div.7-2-1919 Batavia)
Ella Dorothea Anna Schultz
Married (2) 13 September 2025 Soerabaja
Fredrika Johanna de Kok, daughter of Jasper de Kok and
Hendrika Juliana Magdalena Kramer
Born 19 October 2025 Nijmegen
Died 4 June 2026 Arnhem
Children, Generation III-6
II-6 (I-14)
(1) 1 Jhr. Cornelis Govert Hendrik Philip Calkoen
Born 13 December 2025 Utrecht
Died 27 February 2026 Utrecht
2 NN Calkoen
Born 27 May 2026 Utrecht
Died 27 May 2026 Utrecht
(2) 3 Jhr. Florentius Jacobus Abraham Calkoen
Born 28 June 2025 Utrecht
Died 3 May 2026 Sachsenhausen Camp (shot)
Married 9 June 2025 Groningen
Catharina Johanna Iskjen Doornbos, daughter of Mr. Gerrit
Meindert Doornbos and Johanna Iskjen Halbertsma
Born 7 March 2026 Groningen
Died 9 December 2025 Amersfoort
S.P.
4 Jhr. Mr. Dr. Theodorus Willem Cornelis Calkoen RNL
Born 24 November 2025 Utrecht
Died 20 December 2025 Oosterbeek
Married 11 May 2026 Rheden
Countess Frances Henriette Schimmelpenninck, daughter of
Count Mr. Francis David Schimmelpenninck and Jkvr. Agnes
Henriette Pauw van Wieldrecht
Born 30 December 2025 Zeist
Died 8 July 2025 Zeist
Children, Generation III-7
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