Johannes Oedzes Koster
- Born: 20 Aug 1868, Achtkarspelen Friesland Netherlands
- Marriage: Maaike Harmens Hoekstra on 16 May 1891 in Achtkarspelen Friesland Netherlands
- Died: 10 Apr 1914, Kollumerland Friesland Netherlands at age 45
Johannes married Maaike Harmens Hoekstra, daughter of Harmen Berends Hoekstra and Aukjen Freerks Postma, on 16 May 1891 in Achtkarspelen Friesland Netherlands. (Maaike Harmens Hoekstra was born on 27 Jan 1866 in Drogeham Achtkarpselen Friesland Netherlands, died on 25 Feb 1915 in Twizel (Twijzel) Achtkarpselen Friesland Netherlands and was buried in Twizel (Twijzel) Achtkarpselen Friesland Netherlands.)
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