Sara de Rooij (de Rooy) was a daughter of Samson de Rooy (de Rooij) and Carolina Cohen. She married in Amsterdam on 10 March 1920 to Izaak Elzas.
City Archive of Amsterdam, archive card of Samson de Rooy (de Rooij) .
In addition, a Jokos file (number 17552) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.