William Wesley, 3rd Earl of Mornington 731
- Born: 20 May 1763, Dungan Castle, Co. Meath 731
- Marriage: Unknown
- Died: 22 February 1845, Grosvenor Square, London aged 81 731
- Buried: 1845, Grosvenor Chapel, South Audley St, London 143
Lord Mornington has, in his day, been known by several names or titles: first he the Hon. William Wesley; then the old orthography and pronunciation of the name were revived, and he became Mr. Wellesley; then Mr. Wellesley Pole; next he obtained the prefix of Right Honourable; this was followed by the title of Lord Maryborough; and finally, in the month of September, 1842, he became Earl of Mornington.
While Mr. Wesley was at Eton, an event occurred which well deserves to be noticed in its exact chronological place; for it was to him one of the very highest importance. The family name of the house of Mornington was originally Cowley, or Colley. Henry Colley, of Castle Carbery, had several children, the eldest of whom was the paternal grandfather of the noble Earl just deceased; and the only daughter of this Mr. Colley married Mr. Pole, of Ballyfin, in the Queen's County, by whom she had tow sons and four daughters. This gentleman was succeeded by his eldest son, Pariam, and he, dying without issue, was succeeded by his only brother, William; but William also died without issue in the year 1778, and bequeathed his ample possessions to the young Mr. Wesley, who thus becoming the representative of that ancient family, assumed the name and arms of Pole in addtion to those of Wellesley, which latter name had been assumed by his grandfather, in lieu of Colley or Cowley. 731