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| CHILDREN |
| 1. | Jacob Willems Koomen MALE |
| | BIRTH | 2 May 1876 | Wervershoof |
| MARRIAGE | 5 September 1922 | Grietje Rinkel; Spanbroek |
| MARRIAGE | 26 April 1904 | Maria van Ammers; Westwoud |
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| 2. | Grietje Willems Koomen FEMALE |
| | BIRTH | 1879 | |
| DEATH | 1914 | |
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| 3. | Marijtje Willems Koomen FEMALE |
| | BIRTH | 1881 | |
| DEATH | 1959 | |
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| 4. | Volkert Willems Koomen MALE |
| | BIRTH | 1883 | |
| DEATH | 1944 | |
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| 5. | Theodorus Willems Koomen MALE |
| | BIRTH | 1885 | |
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| 6. | Trijntje Willems Koomen FEMALE |
| | BIRTH | 1888 | |
| DEATH | 1945 | |
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| 7. | Johannes Willems Koomen MALE |
| | BIRTH | 1891 | |
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| 8. | Nicolaas Willems Koomen MALE |
| | BIRTH | 1893 | |