Philip Walvis was a son of Hartog Walvis and Rosette van Beetz. He married on 30 April 1919 to Elisabeth Leuiken. Together they had four children. City Archive of Amsterdam, archive card of Philip Walvis.
In addition, a Jokos file (number 9133) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.