Roosje Meijer was a daughter of the cheese merchant at Montfoort Simon Meijer and Helena Troostwijk. She married 16 April 1941 in Amsterdam Erwin Plaat from Holten (Germany), domestic servant, a son of Louis Plaat and Rosa Marchand. Roosje resided in Gouda but was registered per 7 May 1938 at the address Nieuwe Looiersstraat 156 II in Amsterdam. On 23 November 1942 she and her husband Erwin resided with her parents-in-law at Amstel 296 III (3rd Floor).
Roosje had two other siblings: Bertus Samuel and Jacoba Keetje. Beside she self and both her siblings, also her mother was killed in the Shoah. Only her father has survived the Holocaust.
City Archive of Amsterdam, archive cards of Roosje Meijer and Erwin Plaat and Streekarchief Midden Holland, Joodse Families 1750-1950.