Question: Who is Elizabeth Rockefeller Strong's child-in-law?

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.
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.
Elizabeth Rockefeller Strong
Elizabeth "Bessie" Rockefeller (August 23, 1866 – November 14, 1906) was the eldest child of Standard Oil co-founder John Davison Rockefeller (1839–1937) and school teacher Laura Celestia "Cettie" Spelman (1839–1915).
Bessie Rockefeller was a special student at Vassar College 1886–1888.
Strong Hall, the school's first dormitory, was named in honor of Bessie in 1893 by her father who contributed $35,000 toward the expense of the construction.
On March 22, 1889, she married philosopher and psychologist Charles Augustus Strong and had one daughter, Margaret Rockefeller Strong (1897–1985).
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
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
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.
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.
Margaret Rockefeller Strong
Margaret Rockefeller Strong (1897–1985) was an American activist.
Margaret was the daughter of Elizabeth "Bessie" Rockefeller (1866–1906) and Dr. Charles Augustus Strong (1862–1940).
Her maternal grandfather was Standard Oil co-founder John D. Rockefeller (1839–1937).
She married Chilean ballet businessman George de Cuevas on August 3, 1927; they had two children.
After his death, she married Raymundo de Larraín Valdés (1935–1988) in 1977.
Margaret saved a row of Neo-Federal townhouses on Park Avenue designed by McKim, Mead & White from destruction by purchasing the property and giving one of the townhouses to the Queen Sofía Spanish Institute in 1965.
She then donated the corner townhouse to her cousin, David Rockefeller, who founded the Center for Inter-American Relations there.
In December 1979, Margaret donated her father's estate, Villa Le Balze in Fiesole, Tuscany, Italy to Georgetown University which operates an overseas campus there.
Her life can be read at "El Inútil de la Familia", book written by Jorge Edwards, a Chilean writer.
Eusebius (consul 359)
Flavius Eusebius( died after AD 371) was a Roman Senator, who was the brother- in- law of the emperor Constantius II.
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.

Answer: George de Cuevas