Margaretha Dooseman huwde Levie Colthof in 1923 in Amsterdam. Ze scheidden in 1935.
Stadsarchief Amsterdam, archiefkaart Levie Colthof
Margaretha lived at 60 Nieuwe Prinsengracht, Amsterdam.
She lived there with her daughter Roosje, who survived the Holocaust.
Her sister Gonda lived at the same address.
She worked at the Nederlands-Israelitisch Ziekenhuis. Where she worked at the office of the laundry room.