Louis Hamburg and Rosa de Leon married in 1900 in Amsterdam. They had nine children. They lived on the same address as their daughter Rachel. Other children were Rebecca and Barend. A daughter Branca died young.
Stadsarchief Amsterdam, archiefkaart Louis Hamburg
In addition, a Jokos file (number 34556) on this household is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk.