Héctor Barrantes
Héctor Barrantes Sansoni( 1939–1990) was an Argentine polo player.
He was the stepfather of Sarah, Duchess of York.
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.
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 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.
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.
Lolo Soetoro
Lolo Soetoro
( EYD: Lolo Sutoro;; 2 January 1935 – 2 March 1987), also known as Lolo Soetoro Mangunharjo or Mangundikardjo, of Indonesia was the stepfather of Barack Obama, the 44th President of the United States.
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.
Richard Ballantine
Richard Ballantine (25 July 1940 – 29 May 2013) was a cycling writer, journalist and cycling advocate.
Born in America, the son of Ian and Betty Ballantine of Ballantine Books, and educated at the Browning School in New York and Columbia University, he principally resided in London, England.
He is most famous for his 1972 "Richard's Bicycle Book" and its subsequent editions.
He was also an editor at Rufus Publications (founded by his parents) and founded several magazines including "Bicycle" magazine.
Alexander von Hanstein, Count of Pölzig and Beiersdorf
Maximilian Elisäus Alexander von Hanstein, Count of Pölzig and Beiersdorf( 9 June 1804, Burghaig, Kulmbach – 18 April 1884, Schmölln) was a Thuringian count.
He was the stepfather of Prince Albert and grandfather of Hans Poelzig.
Betty Ballantine
Elizabeth Jones Ballantine (September 25, 1919 – February 12, 2019), better known as Betty Ballantine, was an American publisher, editor, and writer.
She was born during the Raj to a British colonial family.
After her marriage to Ian Ballantine in 1939, she moved to New York where they created Bantam Books in 1945 and established Ballantine Books in 1952.
They became freelance publishers in the 1970s.
Their son, Richard, was an author and journalist specializing in cycling topics.

Question: Who is Richard Ballantine's stepfather?
Answer: Ian Ballantine