Nicholas Wadham (1531–1609)
Nicholas Wadham  of Merryfield in the parish of Ilton, Somerset and Edge in the parish of Branscombe
, Devon was a posthumous co-founder of Wadham College, Oxford with his wife Dorothy Wadham who, outliving him, saw the project through to completion in her late old age.
He was Sheriff of Somerset in 1585.
Florence Wadham
Florence Wyndham (1538-1596), wife of Sir John Wyndham (died 1572) of Orchard Wyndham in Somerset, was a daughter of John Wadham (died 1578) of Merryfield, Ilton in Somerset and Edge, Branscombe in Devon and was a sister and co-heiress of Nicholas Wadham (1531/2 – 1609), co-founder of Wadham College, Oxford.
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
Antoninus of Florence
Antoninus of Florence( 1 March 13892 May 1459), was an Italian Dominican friar, who ruled as an Archbishop of Florence.
He is venerated as a saint by the Catholic Church.
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
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 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.
Levi Ruggles
Levi Ruggles( 1824- 1889) known as the" Father of Florence, Arizona" was a soldier and pioneer who founded the town of Florence, Arizona.

Question: Who is the sibling-in-law of Florence Wadham?
Answer: Dorothy Wadham