Levie Walvis was a son of Gabriel Walvis and Rosette Degen. He married in Amsterdam on 13 September 1933 to Marianne Stodel. City Archive of Amsterdam, archive card of Gabriel Walvis.
In addition, a Jokos file (number 33259) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.