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.
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
Hypatius (consul 359)
Flavius Hypatius( c. 340- died after AD 383) was a Roman Senator, who was the brother- in- law of the Roman emperor Constantius II.
Sofie Podlipská
Sofie Podlipská, née Rottová (15 May 1833 in Prague - 17 December 1897 in Prague) was a Czech writer and the sister of Karolina Světlá.
Sofie Podlipská mostly wrote historical novels, juvenile works, and feminist literature.
She also had an interest in Theosophy and helped found the "American Ladies' Club.
"
The name had no geographical meaning instead the word "American" was to designate it as modern and for progress.
Her work emphasized motherhood and morality.
Eusebius (consul 359)
Flavius Eusebius( died after AD 371) was a Roman Senator, who was the brother- in- law of the emperor Constantius II.
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.
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
Karolina Světlá
Karolina Světlá (born Johana Rottová) (24 February 1830 in Prague – 7 September 1899 in Prague) was a Czech female author of the 19th century.
She was associated with the literary May School.
She married Professor Petr Mužák (1821–1892) in 1852, who had taught her music.
She also had an affair with Jan Neruda.
She introduced Eliška Krásnohorská to literature and feminism.
Her first novel "Vesnický román" (A Village Novel) was published in 1867.
Her other works include "Nemodlenec" (1873) and
"Kříž u potoka" (adapted into a film of the same name in 1921).

Question: Who is Sofie Podlipská's sibling-in-law?
Answer: Petr Mužák