Question: Who is the paternal grandfather of Edward Harley, 5Th Earl Of Oxford And Earl Mortimer?
Answer: Edward Harley, 3rd Earl of Oxford and Earl Mortimer

John Harley (29 September 1728 – 7 January 1788) was a British bishop. Harley was the second son of Edward Harley, 3rd Earl of Oxford and Earl Mortimer. He was Archdeacon of Shropshire from 1760 to 1769 and then Archdeacon of Hereford from 1769 to 1787