Betje Salomons was a daughter of Isaac Salomons and Jette Salomons. She was unmarried. She was born into a family of six children, of whom she self, Kalmer, Jonas and Jeannette were killed during the Shoah. One brother probably has survived the war and another sister died already in 1913, 30 years old.
City Archive of Amsterdam, family registration card of Isaac Salomons and archive card of Betje Salomons.