David van Praag was a son of Zacharias van Praag and Schoontje Geleerd. He marriecd 19 May 1908 in Den Helder Mietje Oudkerk, a daughter of Benjamin Oudkerk and Clara van Tijn. They had a married daugther and she, her husband and their three children have survived the war.
David was born in a family of six children: he self, Evalina, Betje, Henri, Levie and Louis. They all have been killed too during the Holocaust.
City Archive of Amsterdam, archive card of Aron Moscoviter and website www.wiewaswie.nl.