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| | 1. Jantje Koolhof, 03 Nov 1874, Winschoten, NL 12 Dec 1943, Winschoten, NL ( 69 ) |
| + | 2. Pieterke Koolhof, 05 Apr 1877, Lutjeloo, Wedde, NL 26 Jan 1934, Winschoten, NL ( 56 ) |
| | 3. Megchelina Koolhof, 27 Aug 1879, Lutjeloo, Wedde, NL Y |
| + | 4. Rijnna Koolhof, 02 May 1882, Lutjeloo, Wedde, NL 25 Nov 1917, Lutjeloo, Wedde, NL ( 35 ) |
| | 5. Hillechien Koolhof, 31 Jul 1885, Lutjeloo, Wedde, NL 30 Mar 1950, Groningen, NL ( 64 ) |
| | 6. Tammo Koolhof, 24 Nov 1888, Lutjeloo, Wedde, NL 12 Dec 1888, Lutjeloo, Wedde, NL ( 0 ) |
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