Heintje van der Sluis, born in Harlingen on December 25, 1903, daughter of Okke van der Sluis (workman and docker) and Antje Tigchelaar.

Heintje was married in Harlingen on December 24, 1931, at the age of 27 to
Arie Vliegenthart (aged 34 years), born in Hendrik Ido Ambacht on November 21, 1897, crane driver.