Johannes Douwes van der Werf
- Born: Cir 1743, Wirdum Friesland Netherlands
- Marriage: Froukjen Willems 28 Apr 1765, Harkema-Opeinde Achkarspelen Friesland tNL
- Died: 1805, Eastermar Tietjerksteradeel Friesland Netherlands
Johannes married Froukjen Willems on 28 Apr 1765 in Harkema-Opeinde Achkarspelen Friesland tNL. (Froukjen Willems was born circa 1742 in Harkema-Opeinde Achkarspelen Friesland tNL and died on 2 Dec 1809 in Eastermar Tietjerksteradeel Friesland Netherlands.)
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