William Thomas Le Poer Trench, 3rd Earl of Clancarty, 2nd Marquess of Heusden, styled Viscount Dunlo between 1805 and 1837, was an Irish peer, as well a nobleman in the Dutch nobility. He was educated at St John's College, Cambridge.
- Occupation
- politician
- Position held
- member of the House of Lords
- Born
- September 21, 1803
- Died
- April 26, 1872
