He is married to Jacomijna van den Mierop.
They got married on January 7, 1665 at Delft, Zuid-Holland, Netherlands, he was 25 years old.
Child(ren):
Nederland's patriciaat
by Epen, Didericus Gijsbertus van, 1868-1930, 1919
p. 116
https://archive.org/details/nederlandspatric10epen_0/page/116/mode/1up
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Hermanus Graswinckel | |||||||||||||||||||||||||||||||||||||
1665 | |||||||||||||||||||||||||||||||||||||
Jacomijna van den Mierop |
The data shown has no sources.