Levie Elsas was a son of Jesaia Elsas and Mietje Wijl. He married 30 October 1906 in Weesp to Keetje de Rooy. The couple had two children: Sara and Marie, who has survived the Holocaust.
City Archive of Amsterdam, archive card of Levie Elsas .
In addition, a Jokos file (number 31921) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.