Isaak Veldman was a son of Mozes Josepha Veldman and Jeltje van der Woude. He married Antje Bobbe in 1902 in Amsterdam. She passed away in 1913. They had four children, among whom Klaartje, Jaantje and Jetje. Isaak Veldman remarried in 1920 to Bathseba Nol.
Stadsarchief Amsterdam, archiefkaart Isaak Veldman