| Generation 1 - Allard Pierson: Born - Friday 08 April 1831 - Amsterdam, Noord-Holland, Nederland |
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| Generation 1 - Allard Pierson: Died - Wednesday 27 May 1896 - Lochem, Gelderland, Nederland |
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| Generation 1 - Allard Pierson: Buried - - Zutphen, Gelderland, Nederland |
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| Generation 1 - Allard Pierson & Pauline Hermine Elizabeth Gildemeester: Married - Thursday 23 February 1854 - Amsterdam, Noord-Holland, Nederland |
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| Generation 2 - Jan Lodewijk Gregorij Pierson: Born - Monday 01 September 1806 - Alkmaar, Noord-Holland, Nederland |
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| Generation 2 - Jan Lodewijk Gregorij Pierson: Baptised - Sunday 14 September 1806 - Alkmaar, Noord-Holland, Nederland |
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| Generation 2 - Jan Lodewijk Gregorij Pierson: Died - Sunday 12 October 1873 - Amsterdam, Noord-Holland, Nederland |
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| Generation 2 - Jan Lodewijk Gregorij Pierson & Ida Oijens: Married - Wednesday 20 May 1829 - Amsterdam, Noord-Holland, Nederland |
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| Generation 2 - Ida Oijens: Born - 1808 - Amsterdam, Noord-Holland, Nederland |
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| Generation 2 - Ida Oijens: Baptised - Saturday 09 January 1808 - Amsterdam, Noord-Holland, Nederland |
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