Frederika Henriette Muller was the youngest of the six children of Abraham Jakob Muller and Rebecca Zippora Coltof. She was unmarried and lived toghether with her father, who was widowed already since October 1923, at Houtmarkt 6 under house. (previously named Jonas Daniël Meijerplein – the name, forbidden by the Germans so the square had the former name again).
Her father was janitor at the N.I.H…