Question: Who is the paternal grandfather of George Tuchet, 1St Earl Of Castlehaven?
Answer: George Tuchet, 9th Baron Audley

Henry Tuchet, 10th Baron Audley, 7th Baron Tuchet (died 30 December 1563) was an English peer. Henry Tuchet was the son of George Tuchet, 9th Baron Audley (died 1560). He married Elizabeth Sneyd, daughter of Sir William Sneyd (or Suede)