Izaak Frank, born 30 May 1878 in Rotterda, was a son of Wilhelm Frank and Marianna Wijmar. He married Rebekka van der Stam in Rotterdam on 16 October 1901, a daughter of David van der Stam and Johanna de Reeder. Rebekka was born in Rotterdam too on 9 Augusat 1878.
The couple had eight children, namely Wilhelm, David, Mozes, Marianna, Meijer, Jacob and the twin Henriette and Joseph. Three children,…