| 1. | Sybesma, Sytske Botes Family/Spouse: Douma, Douwe Jans. [Group Sheet] [Family Chart]
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| 2. | Douma, Trijntje Douwes |
| 3. | Douma, Henke Douwes Henke married Wierenga, Rense Sjolles on 23 Oct 1835 in Oostdongeradeel. Rense (son of Wierenga, Sjolle Markus and Wierenga, Sieuke Sapes) was born about 1800 in Engwierum; died on 22 Feb 1870 in Engwierum. [Group Sheet] [Family Chart]
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| 4. | Douma, Jan Douwes |
| 5. | WIERENGA, Sjolle Renzes Family/Spouse: LIPSTRA, Tjitske Nammens. [Group Sheet] [Family Chart]
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| 6. | WIERENGA, Jan Sjolles Jan married POSTHUMA, Hiltje on 25 May 1905 (civil) in Engwierum. Hiltje was born on 17 Nov 1884 in Akkerwoude; died on 04 Jan 1970. [Group Sheet] [Family Chart]
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