Question: What is the date of death of John Stafford, 1St Earl Of Wiltshire's father?
Sentence (from "Humphrey Stafford, 1st Duke of Buckingham"): Humphrey Stafford, 1st Duke of Buckingham, 6th Earl of Stafford, (December 1402 – 10 July 1460) was an English nobleman and a military commander in the Hundred Years' War and the Wars of the Roses.
Relevant evidence: Yes