Héctor Barrantes
Héctor Barrantes Sansoni( 1939–1990) was an Argentine polo player.
He was the stepfather of Sarah, Duchess of York.
Joan I of Navarre
Joan I (14 January 1273 – 31 March/2 April 1305)  was queen regnant of Navarre and countess of Champagne from 1274 until 1305; she was also queen consort of France by marriage to Philip IV of France.
She was the daughter of king Henry I of Navarre and Blanche of Artois.
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 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.
Louis X of France
Louis X (4 October 1289 – 5 June 1316), called the Quarrelsome, the Headstrong, or the Stubborn , was King of France from 1314 to 1316, succeeding his father Philip IV.
After the death of his mother, Joan I of Navarre, he was also King of Navarre as Louis
I  from 1305 until his death in 1316.
His short reign in France was marked by tensions with the nobility, due to fiscal and centralization reforms initiated by Enguerrand de Marigny, the Grand Chamberlain of France, under the reign of his father.
Louis' uncle—Charles of Valois, leader of the feudalist party—managed to convince the king to execute Enguerrand de Marigny.
Louis allowed serfs to buy their freedom (which was the first step towards the abolition of serfdom), abolished slavery, and readmitted French Jews into the kingdom.
In 1305, Louis had married Margaret of Burgundy, with whom he had Joan II of Navarre.
Margaret was later convicted of adultery and died in prison, possibly murdered by strangulation.
In 1315, Louis married Clementia of Hungary, who gave birth to John I of France a few months after the king's death.
John's untimely death led to a disputed succession.
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.
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.
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.
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.
Margaret of Burgundy, Queen of France
Margaret of Burgundy( 1290 – 30 April 1315) was Queen of France and Navarre as the first wife of Louis X of France( and Louis I of Navarre).

Question: Who is the father of Louis X Of France?
Answer: Philip IV of France