Family tree▼
"John was the son of John de Mohun, 1st Baron Mohun and Sibyll Segrave; daughter of John de Segrave - son of Nicholas de Segrave, 1st Baron Segrave. His father John, was the son of Sire John de Mohun of Dunster, banneret, baron 1299, who sealed the Barons letter to the Pope in 1301. He bore at the Battle of Falkirk (1298), and at the Siege of Carlaverock (1300)"