| Generation 1 - Peter W. Zylstra: Born - Abt 1940 - Illinois |
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| Generation 2 - Fred Zylstra: Born - Abt 1916 - Illinois |
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| Generation 2 - Helen: Born - Abt 1915 - Illinois |
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| Generation 3 - Peter Zylstra: Born - 23 Jan 1871 - Friesland, Netherlands |
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| Generation 3 - Peter Zylstra: Buried - 23 Feb 1939 - Mt. Greenwood Cemetery, Chicago, Cook County, Illinois |
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| Generation 3 - Peter Zylstra & Mary Geldmaker: Married - 13 Jun 1918 - Washington County, Arkansas |
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| Generation 3 - Mary Geldmaker: Died - 12 Sep 1957 - Cook County, Illinois |
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| Generation 4 - Teake Zylstra: Born - Nov 1831 - Friesland, Netherlands |
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| Generation 4 - Teake Zylstra: Died - 28 Oct 1924 - Chicago, Cook County, Illinois |
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| Generation 4 - Aaltje "Alice" Wyma: Born - Oct 1836 - Friesland, Netherlands |
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| Generation 4 - Aaltje "Alice" Wyma: Died - 4 May 1911 - Chicago, Cook County, Illinois |
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| Generation 4 - Jan Frederik Geldmaker: Born - 14 Jun 1846 - Franekeradeel, Friesland, Netherlands |
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| Generation 4 - Jan Frederik Geldmaker: Died - 27 Sep 1924 - Chicago, Cook County, Illinois |
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| Generation 4 - Jan Frederik Geldmaker: Buried - 30 Sep 1924 - Mt. Greenwood Cemetery, Chicago, Cook County, Illinois |
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| Generation 4 - Jan Frederik Geldmaker & Maaike Boekhout: Married - 12 May 1872 - Hoornsterzwaag, Schoterland, Friesland, Netherlands |
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| Generation 4 - Maaike Boekhout: Born - 13 Nov 1842 - Dokkum, Friesland, Netherlands |
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