| Generation 1 - Johannes Haijkens: Born - Friday 10 March 1820 - Bedum, Groningen, Nederland |
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| Generation 1 - Johannes Haijkens: Died - Saturday 23 November 1839 - Groningen, Groningen, Nederland |
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| Generation 2 - Jacob Jannes Haijkens: Born - Saturday 28 May 1791 - Oostwold, Leek, Groningen, Nederland |
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| Generation 2 - Jacob Jannes Haijkens: Baptised - Sunday 05 June 1791 - Oostwold, Leek, Groningen, Nederland |
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| Generation 2 - Jacob Jannes Haijkens: Died - Thursday 16 October 1856 - Bedum, Groningen, Nederland |
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| Generation 2 - Jacob Jannes Haijkens & Itjen Harms Boerema: Married - Thursday 21 September 1815 - Bierum, Groningen, Nederland |
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| Generation 2 - Itjen Harms Boerema: Born - 1792 - Groningen, Groningen, Nederland |
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| Generation 2 - Itjen Harms Boerema: Baptised - Sunday 05 August 1792 - Groningen, Groningen, Nederland |
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| Generation 2 - Itjen Harms Boerema: Died - Monday 07 April 1828 - Bedum, Groningen, Nederland |
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| Generation 3 - Jannes Haijkens: Born - 1742 - Termunten, Groningen, Nederland |
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| Generation 3 - Jannes Haijkens: Baptised - Sunday 04 November 1742 - Termunten, Groningen, Nederland |
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| Generation 3 - Jannes Haijkens: Died - Thursday 06 June 1799 - Oostwold, Midwolda, Groningen, Nederland |
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| Generation 3 - Jannes Haijkens & Fenje Pieters: Married - Sunday 29 June 1777 - Oostwold, Leek, Groningen, Nederland |
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| Generation 3 - Fenje Pieters: Born - 1753 - Midwolda, Groningen, Nederland |
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| Generation 3 - Fenje Pieters: Baptised - Saturday 11 August 1753 - Midwolda, Groningen, Nederland |
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| Generation 3 - Fenje Pieters: Died - Monday 03 October 1836 - Aduard, Groningen, Nederland |
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| Generation 4 - Siwert Heijkens: Born - 1719 - Scheemda, Groningen, Nederland |
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| Generation 4 - Siwert Heijkens: Baptised - Sunday 09 July 1719 - Scheemda, Groningen, Nederland |
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| Generation 4 - Siwert Heijkens: Died - Friday 25 January 1811 - Noordbroek, Groningen, Nederland |
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| Generation 4 - Siwert Heijkens & Weije Brongers: Married - Sunday 17 September 1741 - Termunten, Groningen, Nederland |
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| Generation 4 - Weije Brongers: Born - 1721 - Winschoten, Groningen, Nederland |
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| Generation 4 - Weije Brongers: Baptised - Friday 31 January 1721 - Winschoten, Groningen, Nederland |
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| Generation 4 - Pieter Jakobs & Sijben Egberts: Married - Sunday 26 December 1751 - Midwolda, Groningen, Nederland |
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| Generation 4 - Sijben Egberts: Born - 1730 - Nieuw-Beerta, Beerta, Groningen, Nederland |
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| Generation 4 - Sijben Egberts: Baptised - Sunday 17 September 1730 - Nieuw-Beerta, Beerta, Groningen, Nederland |
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| Generation 4 - Sijben Egberts: Died - Wednesday 11 January 1826 - Finsterwolde, Groningen, Nederland |
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