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.
Géza, Grand Prince of the Hungarians
Géza (940 – 997), also Gejza, was Grand Prince of the Hungarians from the early 970s.
He was the son of Grand Prince Taksony and his OrientalKhazar, Pecheneg or Volga Bulgarianwife.
He married Sarolt, a daughter of an Eastern Orthodox Hungarian chieftain.
After ascending the throne, Géza made peace with the Holy Roman Empire.
Within Hungary, he consolidated his authority with extreme cruelty, according to the unanimous narration of nearly contemporaneous sources.
He was the first Hungarian monarch to support Christian missionaries from Western Europe.
Although he was baptised (his baptismal name was Stephen), his Christian faith remained shallow and he continued to perform acts of pagan worship.
He was succeeded by his son, Stephen who was crowned the first King of Hungary in 1000 or 1001.
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.
Michael of Hungary
Michael (after 960–995 or "c." 997) was a member of the House of Árpád, a younger son of Taksony, Grand Prince of the Hungarians.
Most details of his life are uncertain.
Almost all kings of Hungary after 1046 descended from him.
According to the Hungarian historian, György Györffy, Michael received a "ducatus" or duchy from his brother, Grand Prince Géza.
Slovak historians specify that he administered the "Duchy of Nitra" between around 971 and 997.
However, neither of these theories have universally been accepted by historians.
Eudokia, wife of Constantine V
Eudokia( Greek: Ευδοκία) was the third Empress consort of Constantine V of the Roman Empire.
According to the chronicle of Theophanes the Confessor, Eudokia was a sister- in- law of Michael Melissenos," strategos" of the Anatolikon Theme.
Her sister and brother- in- law were parents to Theodotus I of Constantinople.
Eusebius (consul 359)
Flavius Eusebius( died after AD 371) was a Roman Senator, who was the brother- in- law of the emperor Constantius II.
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
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.
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.
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

Question: Who is the sibling-in-law of Michael Of Hungary?
Answer: Sarolt