Hendrika van Gelder, called Henny, was a daughter of Arnold van Gelder and Sara van Geldere. She married 19 November 1941 in Amsterdam to Louis Eliza Maas. He survived the war.

Hendrika had two other brothers and two sisters. Her parents and her eldest sister have survived the Holocaust. The others, Martin Arnold, Jacob Henri and Elly have been killed in the Shoah.

City Archive of Amsterdam, archive card of Arold van Gelder and Hendrika van Gelder.