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.
Karin Månsdotter
Karin Månsdotter (in English Catherine; 6 November 1550 – 13 September 1612) was Queen of Sweden, first a mistress
and then, for a short period in 1568, the consort of Eric XIV of Sweden.
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.
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.
Gustav of Sweden (1568–1607)
Gustav (January 28, 1568 – February, 1607) was a Swedish prince, the son of Eric XIV and Karin Månsdotter.
The infant Gustav was present at his mother's wedding to the King of Sweden in 1568 and at her coronation, together with his sister Sigrid.
The presence of the children was a way to demonstrate their new status: both of them were officially confirmed as legitimate, and Gustav and his sister were given all the privileges of a royal prince and princess.
After his father's dethronement, Gustav was sent to live outside of Sweden in 1575, to protect him from King John III who feared that the supporters of Eric would try to deprive his son of the crown.
Gustav came to Poland where he lived in poverty and despair.
At some time during his stay he became a Catholic.
Ivan IV of Russia attempted to persuade Gustav to help him in his political ambitions around the Baltic, but these attempts (which included both promises and several years exile) failed.
In August 1599 Gustav arrived in Moscow for a proposed marriage to the Tsar Boris Godunov's daughter Ksenia.
But there, he lived a self-indulgent life.
As a consequence, he invited his old lover Brita and their children to stay in his Russian home, and showing them in public in a carriage harnessed as though it was meant for the tsarina.
As a result, the Tsar eventually broke off the engagement of his beloved daughter.
As compensation, the homeless Gustav received the principality of Uglich, where he lived until the beginning of the reign of the False Dmitry, who ordered his arrest by the demands of his ally — Sigismund III Vasa (cousin of Gustav and son of King John III) and sent him to Yaroslavl jail.
After the death of the False Dmitry, the new tsar, Vasili IV of Russia, released Gustav and sent him to live in the small city of Kashin, Russia.
Gustav Eriksson Vasa died in February 1607 in Kashin and was buried there February 22.
He was in elder history writing thought to have had four children with a certain Brita Karth and perhaps even have married her.
This has however been refuted by modern historians.
Gustav is the main character of the famous Polish novel "Gwiazda spadająca" by Jadwiga Żylińska.
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.
Prince Gustav of Denmark
Prince Gustav of Denmark (Christian Frederik Vilhelm Valdemar Gustav; 4 March 1887 – 5 October 1944) was the fourth and youngest son and seventh child of Frederick VIII of Denmark and his wife, Princess Louise of Sweden and Norway.
On 2 February 1935 in the Russian Orthodox Church in Copenhagen he was, together with his cousin Grand Duchess Olga Alexandrovna of Russia and her husband colonel Nikolai Kulikovsky, a godparent at the christening of Aleksander Schalburg, son of first lieutenant in the Royal Danish Life Guards Christian Frederik von Schalburg.
Prince Gustav remained unmarried and had no children.
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.
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.
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 Gustav Of Sweden (1568–1607)?