Abraham Koopman was a son of Isaac Emanuel Machiel Koopman (1813-1875) and Rebecca Elias Pothuis (1825-1881). He was born in Amsterdam on 8 July 1870 and became a brilliant cutter by profession. On 6 July 1916 he married his niece Elisabeth van Praag, a daughter of Wolf van Praag and Marianne Koopman. She was born on 1 May 1886. Abraham and Elisabeth had no children
From 21 July 1906, Abraham Koop…