Born on 11 January 1903 in Berea, Durban, Natal, Siedle was the youngest son of Otto Siedle, who was born in Woolwich, London of southern German stock and who trained as a watchmaker, subsequently emigrating to Durban where he became prominent in the shipping business and public affairs.
Gibson was born in Durban in 1888, the daughter of Otto Siedle, a prominent local shipping agent, businessman and musician of German extraction.
Otto von Bismarck | Otto | Otto III | Otto Piene | Otto I, Holy Roman Emperor | Otto I | Otto Preminger | Otto II | Otto Dix | Otto Natzler | Otto II, Holy Roman Emperor | Otto Binder | Otto Skorzeny | Otto Schenk | Otto of Brunswick | Otto Kerner, Jr. | Otto Steinbrinck | Otto Kerner | Otto IV, Holy Roman Emperor | Otto IV | Otto III, Holy Roman Emperor | Otto Braun | Miranda Otto | Frei Otto | Otto-Werner Mueller | Otto Schmidt | Otto Muehl | Otto Lilienthal | Otto Klemperer | Otto Hermann Kahn |