Born ‎20-12-1901 Amsterdam, Netherland, died ‎28-5-1943 Sobibor-Biala Podleska, Poland‎, 41 or 42 years. Occupation: Office clerk. Son of Isaac Koster and Rachel Polak‏

Born ‎28-11-1901 Amsterdam, Netherland, died ‎28-5-1943 Sobibor-Biala Podleska, Poland‎, 41 or 42 years. Daughter of Jacob Gokkes - Keijzer and Sara Keijzer - Gokkes‏