Jouke Feenstra, born in Achlum on December 11, 1895, son of Dirk Cornelis Feenstra (carpenter's man and farmer) and Hittje Hiemstra, carpenter.

Jouke was married in Franekeradeel on October 13, 1917, at the age of 21 to
Maria Tigchelaar (aged 20 years), born in Franeker on March 7, 1897, daughter of Jurjen Tigchelaar (gardener) and Jetsche de Jong.