Rosa's death certificate, which places her in Breslau in 1930, says he was an apothecary owner and titled "Doctor". Erna's birth certificate describes her father as an apothecary and doctor of philosophy. The Breslau synagogue community address list (ca 1930) lists a Dr Salomon Wolff, Apotheker at Brockau (Breslau) and gives his date of birth.