Sophia Feenstra, born in Hemelumer Oldeferd on February 25, 1882, daughter of Age Ottes Feenstra (bargeman, shopkeeper and merchant) and Jacoba Johannes de Vries.

Sophia was married in Workum on June 24, 1905, at the age of 23 to
Pier Veenstra (aged approximately 27 years), born circa 1878, sigarenfabrikant.