The Breslau synagogue community address list (ca 1930) lists a Michael Simmenauer, born 20.11.1865 at Taschenstrasse 20; this is likely to be the same person, and the discrepancy of one day in his date of birth suggests he was born after sunset on the 19th. His death certificate, which names his wife, also says he was born on the 20th.

Also at this address is his wife, Minna Simmenauer geb. Lewek, born 21.06.1867, and the couple Isaak Springarn and Marta geb. Simmenauer who I assume are their daughter and son-in-law.