István Horthy de Nagybánya II (born 17 January 1941) is a Hungarian physicist and architect, son of Hungarian deputy regent István Horthy and Ilona Edelsheim-Gyulai, and grandson of Admiral Miklós Horthy who served as Regent of Hungary from 1920 to 1944.
Horthy is a prominent member of the Indonesian spiritual association Subud, and has translated works by its founder, Subuh Sumohadiwidjojo, into English.
He worked as a consulting engineer in England and later in the Far East where he founded and managed two major Indonesian companies in the fields of consulting engineering, construction and property development.
After years in Boston, in the United States, from where he assisted clients in Europe, the Pacific Rim and the United States with their international business strategies, Horthy settled in England.
Sharif is currently married to Tuti, a Javanese woman, and lives with her in Lewes, East Sussex.