Hana (or Chana) 's name is mentioned in her life in the certificates of civil status (NL: burgerlijkestand) as Chasler (occasionally with a small slip of the pen).
Also at from Russian Consulate in Rotterdam received certificate for the marriage of daughter Golda.
Only at two, many years after there deads made, death certificates of her and her son Kelmann, Schösler is writen as her family name.
A reason could be that people has used the family card with that name on it by the making of that death certificates.
Her last name should be Chasler in stead of Schösler.
Certificate of the Russian Consulate, received by the marriage of Hana's daughter Golda 