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
Sandal Castle Sussex and Reigate in Surrey, Castle Acre Castle in Norfolk and Conisbrough in Yorkshire. In 1347, Edward III granted Sandal to his fifth son Edmund of Langley who was six years old at the time. His elder brother John of Gaunt held Pontefract and Knaresborough Castles, Edmund was granted Wark Castle near Coldstream in the Scottish Borders, and in 1377 Fotheringhay Castle in Northamptonshire which was to become his home, and for the next 75 years the family seems to have spent little time at Sandal, leaving it to the management of constables or stewards. In 1385 Edmund was made