William Henry Fitzroy, 6th Duke of Grafton (5 August 1819 – 21 May 1882), styled Viscount Ipswich until 1847 and Earl of Euston between 1847 and 1863, was a British peer and Liberal Party politician. He was born in London and educated at Harrow, and after went to the Royal Military College, Sandhurst.

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Quick Facts His GraceThe Duke of Grafton, Born ...

His Grace The Duke of Grafton
Duke of Grafton
Born	William Henry FitzRoy (1819-08-05)5 August 1819 Middlesex, England
Died	21 May 1882(1882-05-21) (aged 62) London, England
Spouse(s)	The Hon. Marie Baring ​ ​ (m. 1858)​
Parents	Henry FitzRoy, 5th Duke of Grafton Mary Caroline Berkeley

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He was the son of Henry FitzRoy, 5th Duke of Grafton and his wife Mary Caroline Berkeley, who were married on 20 June 1812 in Lisbon. At the time his father was an officer fighting with the Duke of Wellington in the Peninsular War.^{[citation needed]}

At the 1847 general election he was elected unopposed as a Member of Parliament (MP) for the borough of Thetford in Norfolk,^[1] a seat held by his father from 1834 to 1841. He was returned unopposed at the next three general elections,^[1] and held the seat until he succeeded to his father's peerage in 1863.^[2] As well as the titles he inherited almost 26,000 acres.^[3]

Grafton married the Honourable Marie Anne Louise Baring (18 November 1833 – 8 April 1928), the daughter of Francis Baring, 3rd Baron Ashburton, on 10 February 1858. He spent the winter and spring each year at Hyères because he and his wife both suffered from ill health.^{[citation needed]}

In 1860 he was appointed lieutenant-colonel in command of the 1st Administrative Battalion of Northamptonshire Rifle Volunteers.^[4]

He died childless in 1882, aged 62, in London and was succeeded as Duke of Grafton by his younger brother, Augustus.^{[citation needed]}