Israel Cohen was a son of Isaac Cohen and Bertha Kruijer. He married in Den Haag on 6 April 1938 to Clara Viskoper, daughter of Elias Viskoper and Eva Boas.
Civil Registry of Den Haag, family registration cards of Israel Cohen and Elias Viskoper .
In addition, a Jokos file (number 8343) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.