Question: Who is Humphrey Sibthorp (1744–1815)'s paternal grandmother?
Sentence (from "Humphrey Sibthorp (1744–1815)"): Humphrey Sibthorp (3 October 1744 – 25 April 1815) was a British Tory politician who sat in the House of Commons in two periods between 1777 and 1806.
Relevant evidence: No