He was the illegitimate son of Richard Wellesley, 1st Marquess Wellesley and his mistress (later wife) Hyacinthe-Gabrielle Roland and educated at Eton College (1800), Christ Church, Oxford (1805), and Lincoln's Inn (1808).
He represented Queenborough in Parliament from 1810 to 1812, East Grinstead from January to March 1812, and Ennis from 1820 to 1826.
He married in 1821, Jane Eliza, the daughter of George Chambers of Hartford, Huntingdonshire.
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