Mozes van Gelder was a son from the second marriage of Jacob Juda van Gelder to Sara Groenteman. Mozes was not married. He had a brother Raphael, who has survived the Holocaust en a (half)sister Judith. She was killed in the Shoah.
City Archive of Amsterdam, archive cards of Jacob Juda van Gelder, Mozes van Gelder, Raphael van Gelder and website www.wiewaswie.nl