Question: Who is the paternal grandmother of Dudley Ryder, 6Th Earl Of Harrowby?
Sentence (from "John Ryder, 5th Earl of Harrowby"): John Herbert Dudley Ryder, 5th Earl of Harrowby (22 August 1864 – 30 March 1956), briefly known as Viscount Sandon from March to December 1900, was a British peer and Conservative Member of Parliament.
Relevant evidence: No