Born ‎23-9-1863 Medemblik, Belgium, died ‎16-11-1920 Amsterdam, Netherland‎, 56 or 57 years. Occupation: Musician. Son of Eliazar William Koster - Polak and Rachel Hartog Oostra - Nias‏

Born ‎6- Feb 1865 Hoorn, Netherland, died ‎after 16-11-1920‎, at least 55 years. Daughter of Juda Levie Bremer - Prins and Judith Koster - Polak‏