Wyndham Goold
Wyndham Goold( 1812-1854) was a Member of Parliament( MP) for County Limerick from 1850 to 1854.
Goold was educated at Westminster School and Trinity College, Dublin.
He was the son in law of Frederick Falkiner Goold, Archdeacon of Raphoe and brother in law of Bishop Hamilton Verschoyle
Pyotr Karatygin
Pyotr Andreyevich Karatygin (11 July 1805, Saint Petersburg, Russian Empire, - 6 October 1879, Saint Petersburg, Russian Empire) was a Russian dramatist and actor.
The tragic Vasily Karatygin (1802-1853) was his brother.
Karatygin debuted on stage in 1823 and rose to fame performing in Alexander Griboyedov's "Woe from Wit" (the parts of Zagoretsky, Repetilov and, since 1831, Chatsky).
In 1832-1838, as a head of the Drama department in the Saint Petersburg's Theatre College, he discovered and tutored several of the future Russian stage stars, including .
Pyotr Karatygin wrote 68 plays, 53 of them vaudevilles, mostly elaborate variations on foreign plays and Russian novels.
In the 1860s and 1870s he wrote a series of short memoirs on the history of the Russian theatre.
Edited and previewed by his son, Pyotr Karatygin's "Notes" were serialized by "Russkaya Starina" in 1872-1879, to much critical acclaim.
Pavel Petrovich Bulakhov
Pavel Petrovich Bulakhov( 1824-1875) was a Russian composer, and brother of Pyotr Bulakhov.
Charles Francis Norton
Charles Francis Norton( 1807 – 1835) was a 19th- century Member of Parliament for Guildford.
Norton was also a Captain of 52nd Light Infantry; son-in- law of Sir Colin Campbell; brother- in- law of writer Caroline Norton
Nick Sidi
Nick Sidi( born 22 February 1966 in Manchester, England) is an English actor.
He is the son -in- law of actress Rosalind Knight and brother- in- law of actress Susannah Elliott- Knight.
He often plays drama or comedy roles on television and frequently appears in BBC dramas.
Vasily Karatygin
Vasily Andreevich Karatygin   was a leading actor of Russian Romanticism.
Karatygin joined the Bolshoi Theatre in St Petersburg in 1820 and moved to the Alexandrine Theatre in 1832.
He particularly excelled in the numerous productions of Shakespeare's and Schiller's plays, rivalling Moscow's Pavel Mochalov as the greatest Russian actor of his time.
The two volumes of his "Memoirs" are invaluable.
Like other actors of his theatre, Karatygin was buried at the Smolensky Cemetery on Vasilievsky Island.
His remains were later transferred to the national pantheon, the Alexander Nevsky Lavra.
His wife Alexandra Kolosova was admired for her roles in Molière's comedies.
Nikolai Rubinstein
Nikolai Grigoryevich Rubinstein was a Russian pianist, conductor, and composer.
He was the younger brother of Anton Rubinstein and a close friend of Pyotr Ilyich Tchaikovsky.
Greg Penner
Gregory B. Penner( born December 18, 1969) is an American businessman and venture capitalist.
Penner was named the chairman of Walmart on June 5, 2015.
He is the son-in- law of S. Robson Walton and the grandson- in- law of Sam Walton, the founder of Walmart.
Robert Vadra
Robert Vadra is an Indian businessman, entrepreneur and the husband of Priyanka Gandhi.
He is the son -in- law of Sonia Gandhi and Rajiv Gandhi, and the brother- in- law of Rahul Gandhi.
Robert W. Levering
Robert Woodrow Levering( October 3, 1914 – August 11, 1989) was a U.S. Representative from Ohio, son-in- law of Usher L. Burdick and brother- in- law of Quentin N. Burdick.

Question: Who is Pyotr Karatygin's sibling-in-law?
Answer: Alexandra Kolosova