Grietje Sjoerds Kooi
- Born: 24 Dec 1879, Feanwâlden (Veenwouden) Dantumadiel Friesland Netherlands
- Marriage: Martinus Folkerts Fennema 22 Jun 1906, Bergum (Burgum) Tietjerksteradeel Friesland Netherlands
- Died: 1 Feb 1919, Sumar (Suameer) Tietjerksteradeel Friesland Netherlands
Grietje married Martinus Folkerts Fennema, son of Folkert Melles Fennema and Ytje Martinus van der Meulen, on 22 Jun 1906 in Bergum (Burgum) Tietjerksteradeel Friesland Netherlands. (Martinus Folkerts Fennema was born on 11 Feb 1880 in Sumar (Suameer) Tietjerksteradeel Friesland Netherlands and died in 1970 in Drachten Smallingerland Friesland Netherlands.)
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