Gerald Rudolff Ford
Gerald Rudolff Ford( December 9, 1890 – January 26, 1962) was an American businessman, creator of Ford Industries, and Republican politician who was the stepfather of U.S. President Gerald Ford and for whom Ford legally changed his name.
Ola Bratteli
Ola Bratteli (24 October 1946 – 8 February 2015) was a Norwegian mathematician.
He was a son of Trygve and Randi Bratteli.
He took the dr.philos.
degree in 1974, and was appointed professor at the University of Trondheim in 1980, and at the University of Oslo in 1991.
He was a member of the Norwegian Academy of Science and Letters.
Morris Harvey
Morris Harvey( 1877– 1944) was a British actor and writer.
A renowned character actor, he also wrote for the stage, including material for Broadway revues, in which he also appeared.
He was the stepfather of film director Anthony Harvey.
Albert Visetti
Albert Anthony Visetti( 13 May 1846–10 July 1928) was a Dalmatian musician who moved to London where he was Professor of Singing at the Royal College of Music, becoming a Fellow in 1921.
He was the stepfather of the novelist Radclyffe Hall.
Charles Williams, Baron Williams of Elvel
Charles Cuthbert Powell Williams, Baron Williams of Elvel,( born 9 February 1933) is a retired business executive and a Labour peer.
In his 20s he played first- class cricket while at university and for several seasons afterwards.
He is the stepfather of Justin Welby, the Archbishop of Canterbury.
Jerrold Wexler
Jerrold Wexler( June 27, 1924 – November 10, 1992) was a noted American businessman and film producer.
He was the brother of cinematographer Haskell Wexler and the stepfather of actress Daryl Hannah.
Albert E. Austin
Albert Elmer Austin( November 15, 1877 – January 26, 1942) was a Republican member of the United States House of Representatives from 1939 to 1941 and member of the Connecticut House of Representatives from 1917 to 1919 and from 1921 to 1923.
He was the stepfather of Clare Boothe Luce.
Randi Bratteli
Randi Bratteli (17 September 1924 – 9 December 2002) was a Norwegian journalist.
She was born in Hamar as the daughter of Olav Larssen.
She married Trygve Bratteli, who served as Prime Minister of Norway from 1971 to 1972 and 1973 to 1976.
She published several books.
She was member of the board of the friendship association Friends of Israel in the Norwegian Labour Movement (Norwegian: Venner av Israel
i Norsk Arbeiderbevegelse).
Bhavish Aggarwal
Bhavish Aggarwal( born 28 August 1985) is an Indian entrepreneur and co-founder of Ola Cabs.
Héctor Barrantes
Héctor Barrantes Sansoni( 1939–1990) was an Argentine polo player.
He was the stepfather of Sarah, Duchess of York.

Question: Who is the father of Ola Bratteli?
Answer: Trygve Bratteli