Levie van Geens was a son of Jonas van Geens and Margaretha Halberstadt. He married in Rotterdam on 29 March 1911 to Judith Hart. The couple had 10 children, of which 463589 lived not at home anymore but at another address.
City Archive of Amsterdam, archive card of Levie van Geens.
In addition, a Jokos file (number 18672) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.