

He succeeded as the 5th Viscount Wellesley of Dangan Castle [I., 1760] on 1 July 1845.1 He succeeded as the 6th Baron of Mornington [I., 1746] on 1 July 1857.1 He succeeded as the 5th Earl of Mornington [I., 1760] on 1 July 1857.1 He succeeded as the 3rd Baron Maryborough of Maryborough [U.K., 1821] on 1 July 1857.1
On his death, the Barony of Maryborough of Maryborough became extinct.
1813 |
October 7, 1813
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Wanstead House, Essex, England
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1863 |
July 25, 1863
Age 49
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Paris, France
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