 Isak Mogendorff - KoopmansBorn 19-10-1863 Groenlo, Netherland, died 28-10-1943 Westerbork, 79 or 80 years. Occupation: Hide dealer. Son of Jesaia Mogendorff - Leendert and Gezina Maria Koopmans/ Magnu Married 10-10-1893 Leeuwarden-Friesland, Netherland (49 or 50 years married) to:  Henriette de Jong - DrilsmaBorn 16-10-1858 Leeuwarden-Friesland, Netherland. Daughter of HeijmanHeiman Salomon de Jong/ van der Woud and Kaatje Izak Drilsma/ van Biem Children: | |||
1) Heiman-Hein Mogendorff/ de JonBorn 4- jun 1894 Gouda, Netherland, died 9- apr 1943 Sobibor-Biala Podleska, Poland, 48 years | |||
2) Grietje Mogendorff - de JongBorn 26-2-1896 Gouda, Netherland, died 9- apr 1943 Sobibor-Biala Podleska, Poland, 46 or 47 years | |||
| 2nd marriage Isak Mogendorff - KoopmansMarried 23-5-1888 Gouda, Netherland (2 or 3 years married) to: Grietje Trijbits - van LeeuwenBorn 22-3-1869 Gouda, Netherland, died 26-10-1891 Gouda, Netherland, 21 or 22 years. Daughter of Isaac Abraham Trijbets - Sloog and Alida van Leeuwen Children: | |||
1) Jacques Isaac Mogendorff - TrijbitsBorn 16-10-1889 Gouda, Netherland, died 4- aug 1942 Auschwitz, Katowice, Poland, 52 or 53 years. Occupation: Hide merchant | |||
2) Abraham ("Zwarte Bram") Mogendorff/ TrijbitBorn 23-5-1891 Gouda, Netherland, died 24-1-1945 Bergen Belsen, 53 or 54 years | |||