Marcus Goodrich
Marcus Aurelius Goodrich (November 28, 1897 – October 20, 1991) was an American screenwriter and novelist.
He was the first husband of actress Olivia de Havilland.
Their only son Benjamin was born on 1 December 1949.
Before he was married to Elizabeth Norton, Henriette Alice McCrea-Metcalf, Caroline Sleeth, Renee Oakman.
He associated with the Ernest Hemingway group in Paris and was a protégé of Philip Wylie.
He is best known for his 1941 novel "Delilah".
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.
Romanos Argyros (10th century)
Romanos Argyros was a Byzantine aristocrat and son-in- law of Emperor Romanos I Lekapenos.
Livia (mother of Cato)
Livia( c. 120 BC – c. 92 BC) was a Roman matron.
She was the daughter of Marcus Livius Drusus, consul in 112 BC, and sister of Marcus Livius Drusus, tribune of the plebs in 91 BC.
She was the mother of Cato the Younger, and grandmother of Marcus Junius Brutus, through her oldest daughter Servilia.
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
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.
Olivia de Havilland
Dame Olivia Mary de Havilland (born July 1, 1916) is a British-American retired actress whose film career spanned from 1935 to 1988.
She appeared in 49 feature films, was one of the leading actors of her time, and is among the last surviving movie stars of the Golden Age of Classical Hollywood.
Her younger sister was actress Joan Fontaine.
De Havilland first came to prominence as a screen couple with Errol Flynn in adventure films such as "Captain Blood" (1935) and "The Adventures of Robin Hood" (1938).
One of her best-known roles is Melanie Hamilton in the film classic "Gone with the Wind" (1939), for which she received her first of five Oscar nominations, the only one for Best Supporting Actress.
De Havilland departed from ingénue roles in the 1940s and later received acclaim for her performances in "Hold Back the Dawn" (1941), "To Each His Own" (1946), "The Snake Pit" (1948), and "The Heiress" (1949), receiving nominations for Best Actress for each, winning for "To Each His Own" and "The Heiress".
She was also successful in work on stage and television.
De Havilland has lived in Paris since the 1950s, and received honours such as the National Medal of the Arts, the Légion d'honneur, and the appointment to Dame Commander of the Order of the British Empire.
In addition to her film career, deHavilland continued her work in the theatre, appearing three times on Broadway, in "Romeo and Juliet" (1951)
, "Candida" (1952), and "A Gift of Time" (1962).
She also worked in television, appearing in the successful miniseries,  (1979), and  (1986), for which she received a Primetime Emmy Award nomination and won the Golden Globe Award for Best Supporting Actress in a Television Movie or Series.
During her film career, deHavilland also collected two New York Film Critics Circle Awards, the National Board of Review Award for Best Actress, and the Venice Film Festival Volpi Cup.
For her contributions to the motion picture industry, she received a star on the Hollywood Walk of Fame.
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.
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
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.

Question: Who is the sibling-in-law of Marcus Goodrich?
Answer: Joan Fontaine