Siegfried Liebenau was a son of Sally Liebenau and Flora Wilhelm, born 19 February 1899 in Berlin. He was married twice; of his first wife Margot Wolff, born 1 April 1905 in Hamburg is known that she has divorced him in 1932 in Den Haag and that afterwards she remarried Percival Slark Strange, born 1872 in Williton, Somerset (England), in 1937 in Holborn (London). Of this couple is nothing further…