1. | Jan Abes Koolstra Family/Spouse: Regtje Jellema. [Group Sheet] [Family Chart]
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2. | Rinse Jans Koolstra ![]() Rinse married Antje Kool on 20 May 1838 in Leeuwarden, FR, NLD. Antje (daughter of Dieuke Benedictus Kool) was born about 1814 in Dokkum, FR, NLD; died before 1875. [Group Sheet] [Family Chart]
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3. | Ritske Rinses Koolstra ![]() Ritske married Janna Pieters Westerhof on 17 Nov 1875 in Leeuwarden, FR, NLD. Janna (daughter of Pieter Gaukes Westerhof and Trijntje Jans van den Heide) was born about 1849 in Ureterp, Opsterland, FR, NLD. [Group Sheet] [Family Chart]
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4. | Rinze Ritskes Koolstra ![]() Rinze married Trijntje Roelofs Smilde on 30 Aug 1909 in Sneek, FR, NLD. Trijntje (daughter of Roelof Lubberts Smilde and Meintje Romkema) was born on 27 Nov 1881 in Sneek, FR, NLD; died in Utrecht, UT, NLD. [Group Sheet] [Family Chart]
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