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| Family page | 
| Jacob Keizer\Keijzer, birth 17 Jun 1836 Hasselt, Overijssel, Nederland, died 13 Jan 1891 Leeuwarden, Friesland, Nederland, son of Simon Manus Keizer and Naatje Izak or Isaac Melkman
 to: Henderina van der Woude, birth Oldemarkt, Overijssel, Nederland, died 4 Jul 1885 Zwolle, Overijssel, Nederland, daughter of Machiel van der Woude and Mietje Joseph la Blanche | 
| 1) Simon Jacob Keijzer, birth 27 Aug 1870 Zwolle, Overijssel, Nederland, died 23 Apr 1943 Sobibor, Biala Podleska, Polen, occupation: Slager
 to: Elsina Jacobs, birth 5 Nov 1870 Emmen, Drenthe, Nederland, died 23 Apr 1943 Sobibor, Biala Podleska, Polen | 
| 2) Mietje Keijzer, birth 4 Dec 1871 Zwolle, Overijssel, Nederland | 
| 3) Machiel Keijzer, birth 21 MEI 1874 Zwolle, Overijssel, Nederland, died 17 Jul 1874 Zwolle, Overijssel, Nederland | 
| 4) Isaac Keijzer, birth 17 Nov 1875 Zwolle, Overijssel, Nederland, died 2 Dec 1875 Zwolle, Overijssel, Nederland | 
| 5) Isaac Keijzer, birth 24 Sep 1877 Zwolle, Overijssel, Nederland | 
| 6) Martha Keijzer, birth 15 Sep 1881 Zwolle, Overijssel, Nederland | 
| 7) Filip Keijzer, birth 20 Jul 1883 Zwolle, Overijssel, Nederland, died 5 Jul 1884 Zwolle, Overijssel, Nederland |