‎manJoseph Hijman Koker‏‎
Born ‎13-12-1870 Amsterdam, Netherland, died ‎23-11-1942 Auschwitz-Katowice, Poland‎, 71 or 72 years. Occupation: Diamond worker

Marriage/ Related to:

‎womanHenriette Juliana Grohmann - Bamberg‏‎
Born ‎3- may 1882 Rotterdam, Netherland, died ‎23-11-1942 Auschwitz-Katowice, Poland‎, 59 or 60 years. Daughter of Karl Jacob Grohmann - Grohmann and Maria Bamberg - Loonstein‏

Children:

1)
‎manRudolph Koker - Grohmann‏‎
Born ‎8-11-1922 Amsterdam, Netherland, died ‎7- feb 1945 Gross Rosen‎, 22 or 23 years. Occupation: Apprentice draughtsman
2)
‎manDavid Koker - Grohmann‏‎
Born ‎14-9-1925 Amsterdam, Netherland, died ‎30-9-1942 Auschwitz-Katowice, Poland‎, 16 or 17 years
3)
‎womanMaria Koker - Grohmann‏‎
Born ‎22-2-1909 Amsterdam, Netherland, died ‎26-4-1993 Maastricht, Netherland‎, 83 or 84 years. Occupation: Seamstress