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