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.
Caroline Grosvenor
Caroline Susan Theodora Grosvenor CBE (née Stuart-Wortley; 15 June 1858 – 7 August 1940) was a British novelist and artist.
The daughter of the philanthropist Jane Stuart-Wortley and the politician James Stuart-Wortley
, she was born in Westminster, London, and married Norman Grosvenor (died 1898), son of Robert Grosvenor, 1st Baron Ebury, in 1881.
One of their daughters, Susan, married John Buchan, 1st Baron Tweedsmuir.
Grosvenor wrote three novels: "The Bands of OrionThe Thornton Device", and "Laura" (with her older brother, Charles Stuart-Wortley, 1st Baron Stuart of Wortley).
She was a well known miniature and watercolour painter.
She founded the Colonial Intelligence League for Educated Women, which later amalgamated with the Society for Oversea Settlement of British Women, a subsidiary of the Colonial Office.
She was appointed Commander of the Order of the British Empire (CBE) in the 1920 New Year Honours for her services to emigrant British women.
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
Romanos Argyros (10th century)
Romanos Argyros was a Byzantine aristocrat and son-in- law of Emperor Romanos I Lekapenos.
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
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.
Lee Chan-hyuk
Lee Chan- hyuk( born September 12, 1996), is a South Korean singer, songwriter and producer.
He debuted as a member of the sibling duo AKMU in April 2014, under YG Entertainment.
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.
Norman Grosvenor
Captain The Honourable Norman de l'Aigle Grosvenor (22 April 1845 – 21 November 1898), was a British Liberal Party politician.
A member of the Grosvenor family headed by the Duke of Westminster, Grosvenor was a younger son of Robert Grosvenor, 1st Baron Ebury, third son of Robert Grosvenor, 1st Marquess of Westminster.
Robert Grosvenor, 2nd Baron Ebury, was his elder brother.
He was returned to parliament at an unopposed by-election in December 1869 as a Member of Parliament (MP) for Chester, succeeding his cousin Earl Grosvenor, who had succeeded to the peerage.
He did not stand again at the 1874 general election.
Grosvenor married Caroline Susan Theodora, daughter of James Stuart-Wortley, in 1881.
She was a novelist and artist.
One of their daughters, Susan Charlotte Grosvenor, married John Buchan, 1st Baron Tweedsmuir.
Grosvenor died in November 1898, aged 53.
His wife died in August 1940.

Question: Who is Caroline Grosvenor's sibling-in-law?