Question: When did Thomas Beaufort, Count Of Perche's father die?
Sentence (from "John Beaufort, 1st Earl of Somerset"): Beaufort's surname (properly "de Beaufortfrom Beaufort") probably reflects his birthplace at his father's castle and manor of Beaufort ("beautiful stronghold") (from 1688 "Montmorency-Beaufort") in Champagne, France, situated 100 miles east of Paris, 25 miles north-east of Troyes, and between the River Seine and River Marne.
Relevant evidence: No