Abraham van Praag was a son of Moses van Praag and Alida Blitz. He married on 30 June 1909 in Amsterdam to Elisabeth Stranders, a daughter of Elias Stranders en Elisabeth Wiesebron. website www.wiewaswie.nl.
In addition, a Jokos file (number 6376) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.