| Generation 1 - Harm Kolthek: Born - Friday 04 October 1872 - Westerbroek, Hoogezand, Groningen, Nederland |
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| Generation 1 - Harm Kolthek: Died - Saturday 19 January 1946 - Groningen, Groningen, Nederland |
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| Generation 1 - Harm Kolthek & Antje Laan: Married - Saturday 20 May 1893 - Sappemeer, Groningen, Nederland |
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| Generation 1 - Harm Kolthek & Antje Laan: Divorced - Friday 28 November 1919 - Sappemeer, Groningen, Nederland |
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| Generation 1 - Harm Kolthek & Josefina Christina Luisinda Timmer: Married - Friday 07 April 1922 - Amsterdam, Noord-Holland, Nederland |
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| Generation 1 - Harm Kolthek & Josefina Christina Luisinda Timmer: Divorced - Monday 05 July 1926 - Amsterdam, Noord-Holland, Nederland |
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| Generation 1 - Harm Kolthek & Yttje Hartmans: Married - Thursday 04 April 1929 - Groningen, Groningen, Nederland |
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| Generation 2 - Harm Kolthek: Born - Saturday 01 February 1834 - Ten Boer, Groningen, Nederland |
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| Generation 2 - Harm Kolthek: Died - Tuesday 07 March 1922 - Warffum, Groningen, Nederland |
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| Generation 2 - Harm Kolthek & Talligje van Eerden: Married - Saturday 31 January 1863 - Hoogezand, Groningen, Nederland |
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| Generation 2 - Talligje van Eerden: Born - Sunday 15 December 1833 - Kalkwijk, Hoogezand, Groningen, Nederland |
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| Generation 2 - Talligje van Eerden: Died - Sunday 01 November 1908 - Westerbroek, Hoogezand, Groningen, Nederland |
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| Generation 3 - Harm Lubberts Kolthek: Born - Tuesday 10 September 1805 - Hoogezand, Groningen, Nederland |
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| Generation 3 - Harm Lubberts Kolthek: Baptised - Sunday 22 September 1805 - Hoogezand, Groningen, Nederland |
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| Generation 3 - Harm Lubberts Kolthek: Died - Saturday 01 November 1879 - Kolham, Slochteren, Groningen, Nederland |
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| Generation 3 - Harm Lubberts Kolthek & Geertje Harms Kruizinga: Married - Saturday 27 August 1831 - Ten Boer, Groningen, Nederland |
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| Generation 3 - Geertje Harms Kruizinga: Born - Friday 13 March 1801 - Garmerwolde, Ten Boer, Groningen, Nederland |
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| Generation 3 - Geertje Harms Kruizinga: Baptised - Sunday 22 March 1801 - Garmerwolde, Ten Boer, Groningen, Nederland |
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| Generation 3 - Geertje Harms Kruizinga: Died - Tuesday 19 April 1864 - Scharmer, Slochteren, Groningen, Nederland |
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| Generation 3 - Lammert Abels van Eerden: Born - Approximately 1804 - Woltersum, Ten Boer, Groningen, Nederland |
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| Generation 3 - Lammert Abels van Eerden: Died - Wednesday 05 January 1887 - Woltersum, Ten Boer, Groningen, Nederland |
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| Generation 3 - Lammert Abels van Eerden & Grietje Abrahams ten Cate: Married - Sunday 02 November 1828 - Ten Boer, Groningen, Nederland |
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| Generation 3 - Grietje Abrahams ten Cate: Born - Tuesday 24 October 1809 - Kleinemeer, Sappemeer, Groningen, Nederland |
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| Generation 3 - Grietje Abrahams ten Cate: Died - Saturday 19 February 1881 - Westerbroek, Hoogezand, Groningen, Nederland |
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| Generation 4 - Abram Gerrits ten Cate: Born - Approximately 1769 - Sappemeer, Groningen, Nederland |
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| Generation 4 - Abram Gerrits ten Cate: Died - Saturday 14 July 1827 - Sappemeer, Groningen, Nederland |
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| Generation 4 - Abram Gerrits ten Cate & Anje Jans: Married - Friday 27 May 1791 - Zuidbroek, Groningen, Nederland |
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| Generation 4 - Anje Jans: Born - Friday 10 October 1766 - Muntendam, Groningen, Nederland |
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| Generation 4 - Anje Jans: Died - Wednesday 27 August 1828 - Kleinemeer, Sappemeer, Groningen, Nederland |
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