Izaak Abraham Wilkens was a son of Abraham Wilkens and Regina Gras. He married 20 March 1934 in Winschoten to Estella Lina Israels, a daughter of Jozef Israels and Bertha Bath Sebah Cohen. The couple had one daughter: Bertha Regina.
City Archive of Amsterdam, archive card of Izaak Abraham Wilkens and website www.wiewaswie.nl.
This person is commemorated on a memorial in Zierikzee. More information on this memorial can be found (in Dutch) on the website of the Nationaal Comité 4 en 5 mei.