Beatrice of Castile (1242–1303)
Beatrice of Castile( 1242/1244 – 27 October 1303), an illegitimate daughter of Alfonso X of Castile and his mistress Mayor Guillén de Guzmán, was the second Queen consort of Afonso III of Portugal.
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.
María de Molina
María Alfonso Téllez de Meneses (c. 1265 – 1321), known as María de Molina, was queen consort of Castile and León from 1284 to 1295 by marriage to Sancho IV of Castile, and served as regent for her minor son Ferdinand IV (1295 - c.1301) and later her grandson Alfonso XI of Castile (1312-1321).
Héctor Barrantes
Héctor Barrantes Sansoni( 1939–1990) was an Argentine polo player.
He was the stepfather of Sarah, Duchess of York.
Henry of Castile the Senator
Henry of Castile( March 1230 – 8 August 1303), called the Senator(" el Senador"), was a Castilian" infante", the fourth son of Ferdinand III of Castile by his first wife, Beatrice of Swabia.
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.
Beatrice of Castile (1293–1359)
Beatrice of Castile or Beatriz (8 March 129325 October 1359), was an infanta of Castile, daughter of Sancho IV and María de Molina.
She was Queen of Portugal from the accession of her husband, Afonso IV, until his death on 28 May 1357.
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.

Question: Who is Beatrice Of Castile (1293–1359)'s father?
Answer: Sancho IV of Castile