Barend Coster was a son of Jacob Coster and Sara Gompel. He was born on 15 January 1883 in Rotterdam, where he married Betje van Coevorden on 13 September 1905, born on 6 December 1884 as daughter of Levie Israël van Coeverden and Mietje Heimans. The couple had four children, viz. Sara in 1906, Hendeline in 1908, Jacob in 1912 and in 1918 Mietje was born. Barend Coster earned his living as a shopk…