She is married to Jelle Das.
They got married on November 11, 1911 at Wolvega , she was 19 years old.Source 3
Child(ren):
Geboorteregister 1892, archiefnummer 30-41, Burgerlijke Stand Weststellingwerf - Tresoar, inventarisnummer 1052, aktenummer 218
http://www.graftombe.nl/names/info/717031/oostra
Huwelijksregister 1911, archiefnummer 30-41, Burgerlijke Stand Weststellingwerf - Tresoar, inventarisnummer 2057, aktenummer 92