Walter Devereux, 1st Earl of Essex
Walter Devereux was the eldest son of Sir Richard Devereux, who was created a Knight of the Bath on 20 February 1547 and died that same year, in the lifetime of his father, The 1st Viscount Hereford. Walter Devereux's mother was Lady Dorothy Hastings, daughter of The 1st Earl of Huntingdon and Anne Stafford, said to have been a mistress of Henry VIII. Through his paternal ancestry he was related to the Bourchier family, to which previous Earls of Essex had belonged: John Devereux, son of Walter Devereux who died at the Battle of Bosworth, married Cecily Bourchier, sister of Henry Bourchier, 2nd Earl of Essex.
William Devereux, Baron Devereux of Lyonshall
William Devereux was summoned on 6 February 1299 (27 Edward I) to attend the Parliament on 8 March by writ directed to ‘William de Ebroicis.’ By this he is held to have become a Baron and ‘Lord Deverois.’