Question: Who is the paternal grandfather of James Tuchet, 5Th Earl Of Castlehaven?
Sentence (from "Mervyn Tuchet, 4th Earl of Castlehaven"): Mervyn Tuchet, 4th Earl of Castlehaven (died 2 November 1686) was the third son of Mervyn Tuchet, 2nd Earl of Castlehaven, and his first wife, Elizabeth Barnham (1592 – c. 1622).
Relevant evidence: Yes