Sytse Jans Helder
- Born: 13 Oct 1816, Opsterland Friesland Netherlands
- Marriage: Antje Geerts van der Heide 18 May 1867, Tietjerksteradeel Friesland Netherlands
- Died: 18 Jan 1889, Tietjerksteradeel Friesland Netherlands at age 72
 Another name for Sytse was Sytze.
Sytse married Antje Geerts van der Heide, daughter of Geert Aukes van der Heide and Janke Jacobus Pruimboom, on 18 May 1867 in Tietjerksteradeel Friesland Netherlands. (Antje Geerts van der Heide was born on 5 Feb 1813 in Tietjerksteradeel Friesland Netherlands and died on 11 Nov 1875 in Tietjerksteradeel Friesland Netherlands.)
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