William de la Pole, 1st Duke of Suffolk, KG (16 October 1396 – 2 May 1450), was an English commander in the Hundred Years' War and Lord High Admiral of England from 1447 until 1450. He was nicknamed Jackanapes. He also appears prominently in William Shakespeare's Henry VI, Part 1 and Henry VI, Part 2. Already holder of the title Earl of Suffolk, he was granted the additional titles Marquess of Suffolk (1444), Earl of Pembroke (1447) and Duke of Suffolk (1448).