David Zak was a son of Machiel Zak and Judith Olivier. He married Rachel Zomerplaag on September 4th 1895 in Amsterdam. She was a daughter of David Elias Zomerplaag and Vrouwtje Wertheijm.
The couple had no children.
David himself was born into a family with twelve children. Two of them died in childhood. The others all have been killed during the Holocaust.
City Archive of Amsterdam, family regis…