Daniel Hendrik de Leeuw and Anna van Collem married in 1915 in Zaandam. They had a daughter Jeanne.
Stadsarchief Amsterdam, archiefkaart Daniel Hendrik de Leeuw
In addition, a Jokos file (number 16020) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.