Kaethe Danziger (geb. Halberstaedter) tells us that he was a doctor, married to Rose Sussmann. Details in Rose's burial record confirm that her husband was a doctor named Borinski.

SF's research into the Falk family gives his date of birth to Max Borinski and Sophie Falk.

The list of Jewish ophthalmologists includes a Leo Borinksi of the same date of birth and places him in Beuthen; the 1937 phone book and the 1939 census give his address as Bahnhoffstrasse 1.

He studied at Friedrich-Wilhelms University in Breslau, where his doctoral thesis Der intraoculare Druck beim Diabetes was published in 1925.

In 1927 he secured a position as an assistant doctor in the gynaecology department of the Israelitischen Kranken-Verpflegungs-Anstalt und Beerdigungs-Gesellschaft in Breslau. In related correspondence, he gives his address as Rehdigerstrasse 15; this address was occupied in ca 1930 by his mother, his brother Alfred and Alfred's wife.

His first wife, Rose Sussmann was the daughter of his cousin, Paula Sussmann geb. Borinski.

After the Second World War Leo lived in Munich: an eye-doctor of that name is listed in the telephone directories for 1948 to 1955 - thanks to Christiane Thies for this information and the supporting link. His Munich citizen registration card confirms this is the same person, and provides details of his marriages and children. It also shows his religion as Protestant ("ev."), although he was born into a Jewish family and his wife Elisabeth is shown as Jewish ("mz.").

His citizen registration card shows a daughter, Ingeborg and the statement "no further children". The note against Ingeborg's name refers to sections 1757 and 1758 of the Bürgerliches Gesetzbuch; these state that (1757): "The child is given the name of the adopting person" and (1758): "Without permission of the adopting person and the adopted child it is not allowed to reveal the circumstances of the adoption, unless there are special reasons of common interest." I assume that Inge was Elisabeth's daughter by her first husband, and that Leo adopted her on marrying Elisabeth. The 1939 census shows that Ingeborg was living with Leo and Elisabeth at that time. Thanks to Stephen Falk for raising the possibility and to Christiane Thies for confirming and translating the statute.