Question: Which third cousin of Henry VIII had a great-grandfather who had a deadly rivalry with Richard Plantagenet?
Sentence (from "Edmund Beaufort, 2nd Duke of Somerset"): Edmund Beaufort, 2nd Duke of Somerset, KG (1406 – 22 May 1455), sometimes styled 1st Duke of Somerset, was an English nobleman and an important figure in the Wars of the Roses and in the Hundred Years' War.
Relevant evidence: Yes