John Holland, 1st Duke of Exeter John Holland, 1st Duke of Exeter John Holland, 1st Duke of Exeter (c. 1352 – 16 January 1400) also 1st Earl of Huntingdon, was an English nobleman, a half-brother of King Richard II (1377–1399), to whom he remained strongly loyal. He is primarily remembered for being suspected of assisting in the downfall of King Richard's uncle Thomas of Woodstock, 1st Duke of Gloucester (1355–1397) (youngest son of King Edward III) and then for conspiring against King Richard's first cousin and eventual deposer, Henry Bolingbroke, later King Henry IV (1399–1413). He was the third son of Thomas Holland, 1st Earl of
Lancaster Castle On the death of Henry II, the Honour passed to his son, Richard the Lionheart, who gave it to his brother, Prince John, in the hope of securing his loyalty. One of the functions castles served was as a prison; the first record of the castle being used in this way was in 1196, although the role became much more important after the English Civil War. Since the 12th century, the monarch appointed a sheriff to maintain the peace in Lancashire, a role usually filled by the duke and based at the castle. In the late 12th and early 13th