Abdul-Vahed Niyazov
' of Russia.
Héctor Barrantes
Héctor Barrantes Sansoni( 1939–1990) was an Argentine polo player.
He was the stepfather of Sarah, Duchess of York.
Matryona Balk
Matryona Ivanovna Balk( née Modesta Mons; fl. 1718), was a Russian courtier.
She was a lady- in- waiting and confidant of Catherine I of Russia, Ober- Hofmeisterin of Tsarevna Catherine Ivanovna of Russia and sister of Anna Mons.
She was accused in 1718 for having assisted the empress in her love affair with Willem Mons.
Praskovia Saltykova
Praskovia Fyodorovna Saltykova  (12 October 1664 – 13 October 1723) was the tsaritsa of Russia as the only wife of Ivan V of Russia.
She was the mother of Empress Anna of Russia.
She played an important part as the most senior woman of the Russian court in 1698–1712.
Princess Catherine Ivanovna of Russia
Princess Catherine Ivanovna of Russia( 12 July 1915( O.S.) – 13 March 2007) was a great- great- granddaughter of Tsar Nicholas I of Russia and a niece of King Alexander I of Yugoslavia.
She was the last member of the Imperial Family to be born before the fall of the dynasty.
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.
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.
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 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.
Tsarevna Catherine Ivanovna of Russia
Tsarevna Catherine Ivanovna of Russia (20 October 1691 – 14 June 1733) was a daughter of Tsar Ivan V and Praskovia Saltykova, eldest sister of Empress Anna of Russia and niece of Peter the Great.
By her marriage, she was a Duchess of Mecklenburg-Schwerin.

Question: Who is Tsarevna Catherine Ivanovna Of Russia's father?