Richard Trench, 4th Earl of Clancarty
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.
Trench was born in Dublin, Ireland, the son of William Trench, 3rd Earl of Clancarty and Lady Sarah Juliana Butler. On 29 November 1866 he married Lady Adeliza Georgiana Hervey, daughter of Frederick William Hervey, 2nd Marquess of Bristol and Lady Katherine Isabella Manners. They had three children.
- William Frederick Le Poer Trench, 5th Earl of Clancarty.
- Lady Katherine Anne Le Poer Trench.
- Hon. Richard John Le Poer Trench.
