He is married to Maria Jacoba Hugonia Repelaer.
They got married on June 4, 1908 at Zeist, Utrecht, Netherlands , he was 26 years old.
Child(ren):
Nederland's patriciaat
by Epen, Didericus Gijsbertus van, 1868-1930, 1919
p. 56
https://archive.org/details/nederlandspatric10epen_0/page/56/mode/1up
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Jacob Theodoor van Beeck Calkoen | ||||||||||||||||||||||||||||||||||
1908 | ||||||||||||||||||||||||||||||||||
Maria Jacoba Hugonia Repelaer |
The data shown has no sources.