Richard Somerset Le Poer Trench, 4th Earl of Clancarty, 3rd Marquess of Heusden, styled Viscount Dunlo between 1837 and 1872, was an Irish peer, as well a nobleman in the Dutch nobility.
- Occupation
- politician
- Position held
- member of the House of Lords
- Born
- January 13, 1834
- Died
- May 29, 1891