He is married to Cornelia Constantia van der Muelen.
They got married on April 23, 1794 at Amsterdam, Noord-Holland, Netherlands, he was 24 years old.
Child(ren):
https://de.wikipedia.org/wiki/Harmen_Jan_van_der_Wijck
https://www.kennisbank-waterbouw.nl/tresor/auteur.php?code=M&naam=vdWijck
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Nederland's adelsboek, 1918
p. 410
https://archive.org/details/nederlandsadelsb28unse_18/page/410/mode/1up
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Harmen Jan (Herman Johan) van der Wijck | ||||||||||||||||||||||||||||||||||||||
1794 | ||||||||||||||||||||||||||||||||||||||
Cornelia Constantia van der Muelen |
The data shown has no sources.