Mozes de Rooy (de Rooij) was a son of Samson de Rooij (de Rooy) and Carolina Cohen. He married in Amsterdam on 20 July 1921 to Sara de Magtige. City Archive of Amsterdam, archive card of Samson de Rooij (de Rooy).
In addition, a Jokos file (number 17551) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.