Maartje Salomon Kannewasser, born 18 March 1888 in Den Helder, was a daughter of Salomon Aron Kannewasser and Jansje (Gittel) Leon Beek. She was unmarried and she worked as houskeeper.
When her brother Leon Kannewasser became a widower in 1924 and his wife Ester Philip Vrieslander had been interred, the unmarried Maartje Kannewasser came some time later living in with Leon at Zuidstraat 88 in Den …