| Generation 1 - Jacob Sikke Havinga: Born - Thursday 02 January 1902 - Winschoten, Groningen, Nederland |
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| Generation 1 - Jacob Sikke Havinga: Died - Saturday 01 May 1982 - Leeuwarden, Friesland, Nederland |
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| Generation 1 - Jacob Sikke Havinga & Klaassina Ufkes: Married - Tuesday 27 January 1925 - Scheemda, Groningen, Nederland |
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| Generation 2 - Hendrik Havinga: Born - Saturday 11 April 1874 - Oostwold, Midwolda, Groningen, Nederland |
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| Generation 2 - Hendrik Havinga: Died - Saturday 18 July 1953 - Winschoten, Groningen, Nederland |
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| Generation 2 - Hendrik Havinga & Wubbina Ottes: Married - Thursday 07 February 1901 - Nieuwolda, Groningen, Nederland |
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| Generation 2 - Wubbina Ottes: Born - Friday 31 December 1875 - Nieuwolda, Groningen, Nederland |
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| Generation 2 - Wubbina Ottes: Died - Tuesday 09 June 1953 - Winschoten, Groningen, Nederland |
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| Generation 3 - Jakob Sikkes Havinga: Born - Sunday 30 November 1845 - Midwolda, Groningen, Nederland |
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| Generation 3 - Jakob Sikkes Havinga & Anna Dik: Married - Friday 02 May 1873 - Midwolda, Groningen, Nederland |
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| Generation 3 - Anna Dik: Born - Friday 21 January 1842 - Zuidbroek, Groningen, Nederland |
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| Generation 3 - Rijnko Reinko Ottes: Born - Sunday 18 May 1845 - Midwolda, Groningen, Nederland |
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| Generation 3 - Rijnko Reinko Ottes & Anna Hekman: Married - Saturday 10 April 1875 - Nieuwolda, Groningen, Nederland |
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| Generation 3 - Anna Hekman: Born - Saturday 19 April 1851 - Nieuwolda, Groningen, Nederland |
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| Generation 3 - Anna Hekman: Died - Saturday 07 December 1889 - Groningen, Groningen, Nederland |
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| Generation 4 - Eltjo Hindriks Ottes: Born - Thursday 29 August 1805 - Meeden, Groningen, Nederland |
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| Generation 4 - Eltjo Hindriks Ottes & Hilje Berends Haan: Married - Saturday 06 May 1837 - Midwolda, Groningen, Nederland |
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| Generation 4 - Hilje Berends Haan: Born - Monday 21 February 1814 - Midwolda, Groningen, Nederland |
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| Generation 4 - Jan Eppes Hekman: Born - Sunday 21 March 1819 - Bellingwolde, Groningen, Nederland |
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| Generation 4 - Jan Eppes Hekman & Wubbina Nuisker: Married - Tuesday 02 May 1848 - Nieuwolda, Groningen, Nederland |
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| Generation 4 - Wubbina Nuisker: Born - Sunday 04 December 1814 - Nieuwe Pekela, Groningen, Nederland |
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