Question: Who is Richard Trench, 4Th Earl Of Clancarty's paternal grandmother?
Sentence (from "William Trench, 3rd Earl of Clancarty"): William Thomas Le Poer Trench, 3rd Earl of Clancarty, 2nd Marquess of Heusden (21 September 1803 – 26 April 1872), styled Viscount Dunlo between 1805 and 1837, was an Irish peer, as well a nobleman in the Dutch nobility.
Relevant evidence: No