Abraham Wertheim was a son of Hartog Wertheim and Femmetje Monnikendam. He married in Amsterdam on 18 March 1925 to Margaretha Salomons. The couple had one daughter Hetty.
City Archive of Amsterdam, archive card of Abraham Wertheim.
In addition, a Jokos file (number 31187) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.