Henry Beaufort, 3rd Duke of Somerset
Henry Beaufort, 3rd Duke of Somerset was an important Lancastrian military commander during the English Wars of the Roses. He is sometimes numbered the 2nd Duke of Somerset, because the title was recreated for his father after his uncle died. He also held the subsidiary titles of 5th Earl of Somerset, 2nd Marquess of Dorset and 2nd Earl of Dorset.
Somerset, born about January 1436, was the son of Edmund Beaufort, 2nd Duke of Somerset, and Eleanor, daughter of Richard Beauchamp, Earl of Warwick and widow of Thomas, fourteenth baron Roos of Hamlake. From 1443 to 1448 Henry was styled Earl of Mortain or Morteign, and from 1448 to 1455 Earl of Dorset. While still a youth he fought at the First Battle of St Albans , where he was wounded and his father was killed thereby he inherited the title of 3rd Duke of Somerset.
Source: Wikipedia