Ruth Marion came to the Netherlands on November 28th, 1938, and lived at the girls orphanage in Amsterdam until July 1942. Her mother, Margarethe Cossmann, born in 1896 in Bielefeld, was living in London in September 1940. Her father Hugo, born in 1890 in Heimerzein, was then still living in Köln, Briebergstr. 8.
Source: National Archive, 2.04.58, inv 130 and others.
See also: dokin.nl