The name of Rosa Ehrenreich is on a list of Jewish children that were not allowed to attend a public school anymore since 1 September 1941.
Utrechts Archief, toegang 1007-3, inv. nr. 26 465
According to the Sterbebücher of Auschwitz Rosa Ehrenreich died on 28 August 1942. It is possible this date is different from the official day of death as established after the war by the Department of Justice.
More information about this person can be found on www.dokin.nl