Abraham Hamburger was a son of David Hamburger and Mietje Oppenheim. He was born in Amsterdam on 7 July 1877 but arrived in Rotterdam in March 1903, where he was registered at the address Diergaardelaan 60. On 9 June 1903 he got married there to Celina Tabak, a daughter of Salomon Tabak and Sara Cohen. She was born on 5 August 1874 in Amsterdam and after being wed to Abraham Hamburger, she joined …