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| | 1. Derk Westerkamp, 30 Jul 1890, Schildwolde, Slochteren, NL 28 Jan 1891, Schildwolde, Slochteren, NL ( 0 ) |
| + | 2. Derk Westerkamp, 12 Aug 1891, Wittewierum, Ten Boer, NL Y |
| | 3. Hindrik Westerkamp, 26 Apr 1894, Wittewierum, Ten Boer, NL 2 Dec 1966 ( 72 ) |
| | 4. Tjake Westerkamp, 17 Feb 1896, Wittewierum, Ten Boer, NL Y |
| + | 5. Jannes Westerkamp, 29 May 1897, Wittewierum, Ten Boer, NL Y |
| | 6. Klaas Westerkamp, 23 Nov 1898, Wittewierum, Ten Boer, NL 5 Jun 1967 ( 68 ) |
| | 7. Arend Westerkamp, 17 Jul 1900, Groningen, NL 8 Aug 1901, Wittewierum, Ten Boer, NL ( 1 ) |
| | 8. Zwaantje Klazina Westerkamp, 29 Nov 1902, Wittewierum, Ten Boer, NL 25 May 1903, Groningen, NL ( 0 ) |
| | 9. Arent Westerkamp, 19 Dec 1906, Wittewierum, Ten Boer, NL 6 Jun 1907, Wittewierum, Ten Boer, NL ( 0 ) |
| | 10. Trijntje Westerkamp, 17 Apr 1908, Wittewierum, Ten Boer, NL 7 May 1908, Wittewierum, Ten Boer, NL ( 0 ) |
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