Richard FitzWilliam, 6th Viscount FitzWilliam

Richard FitzWilliam, 6th Viscount FitzWilliam (24 July 1711 - 25 May 1776), KB, PC, FRS, of Mount Merrion, near Dublin, Ireland, was an Irish peer and property developer.

Richard FitzWilliam, 6th Viscount FitzWilliam, wearing the Star of the Order of the Bath. Portrait c.1744 by William Hoare. Fitzwilliam Museum, Cambridge

Arms of Fitwilliam: Lozengy argent and gules

Origins

He was the eldest son and heir of Richard FitzWilliam, 5th Viscount FitzWilliam by his wife Frances Shelley, a daughter of Sir John Shelley, 3rd Baronet.

Career

He replaced his father as Vice-Admiral of Leinster in 1728. He succeeded his father in the viscountcy in 1743 and took his seat in the Irish House of Lords. He was created a Knight Companion of the Order of the Bath (KB) in 1744 and was elected a Fellow of the Royal Society in 1747.[1] He was sworn of the Irish Privy Council in 1766. He lived for a time at Richmond Green in Surrey with his father-in-law Sir Matthew Decker, 1st Baronet, but moved back to Mount Merrion, the family's principal seat near Dublin.

Marriage and children

Catherine Decker, portrait c.1744 by William Hoare. Fitzwilliam Museum

On 3 May 1744 he married Catherine Decker, eldest daughter and co-heiress of Sir Matthew Decker, 1st Baronet, a wealthy merchant of Dutch origin, by his wife Henrietta Watkins. Horace Walpole thought the marriage notable enough to mention in his correspondence.[2] By Catherine he had issue including:

Richard FitzWilliam, 7th Viscount FitzWilliam (c. 22 August 1745 - 1816), eldest son and heir, who inherited the Decker mansion and art collection at Richmond and died unmarried and without legitimate issue; by his will he founded the Fitzwilliam Museum in Cambridge.
William Fitzwilliam, (c. 18 September 1749 Richmond - pre-1816)
John FitzWilliam, 8th Viscount Fitzwilliam, (c.21 Oct 1752 Richmond – 1830)
Thomas FitzWilliam, 9th Viscount Fitzwilliam (c.3 September 1755 Richmond - January 1833) [3]
Henrietta FitzWilliam, (c. 16 October 1746 Richmond - )
Mary FitzWilliam, (c. 20 August 1748, Richmond - )
Hon. Catherine FitzWilliam, (c.30 Oct 1753 Richmond - )

Death

He died on 25 May 1776 at Mount Merrion and was buried at Donnybrook Cemetery.

References

"Fellows details". Royal Society. Retrieved 16 February 2019.
Letters of Horace Walpole, Earl of Orford, to Sir Horace Mann Richard Bentley London 1833 Vol. 2 p.12
Sir Bernard Burke (1866). A genealogical history of the dormant, abeyant, forfeited, and extinct peerages of the British empire. Harrison.

Peerage of Ireland
Preceded by Richard FitzWilliam	Viscount FitzWilliam 1743–1776	Succeeded by Richard Fitzwilliam

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[1] "Fellows details". Royal Society. Retrieved 16 February 2019.

[2] Letters of Horace Walpole, Earl of Orford, to Sir Horace Mann Richard Bentley London 1833 Vol. 2 p.12

[3] Sir Bernard Burke (1866). A genealogical history of the dormant, abeyant, forfeited, and extinct peerages of the British empire. Harrison.