Robert William Keate (1814-1873), English cricketer and British colonial administrator
The duke's illegitimate son (by Elizabeth Hungerford Keate), James Smithson (1765–1829), is famed for having made the founding bequest and provided the name for the Smithsonian Institution in Washington, D.C..
He was born in Laverton, Somerset, the fourth son of William Keate, rector of Laverton, and brother of John Keate (1773–1852), headmaster of Eton College.
Keate later joined the colonial civil service upon, and was sent to the West Indies in 1857 as Governor of Trinidad, a position he held from 26 January 1857 to 1864.
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Keate died at Cape Coast Castle in the Gold Coast on 17 March 1873, just ten days into his Governorship.