Sjoerd Cornelis Feenstra, born in Achlum on February 11, 1862, son of Cornelis Pieters Feenstra (carpenter's man) and Joukje Dirks Feenstra, worker.
Sjoerd was married in Wonseradeel on December 9, 1899, at the age of 37 to
Thomaske van der Sluis (aged 35 years), born in Makkum on October 30, 1864, daughter of Eeltje Bouwes van der Sluis (olieslagersknecht) and Eelkjen Sikkes Hellinga.