Henry VI of England

Henry VI (1421–1471), of the House of Lancaster, was King of England 1422–1461 (though with a Regent until 1437) and a claimant to the kingdom of France 1422–1453. Crowned while an infant, Henry's reign was chaotic, owing in part to his passive temperment and his growing insanity. His rule ended with his overthrow by the House of York. He himself was imprisoned in the Tower of London for a time before he was quietly murdered.

Henry VI in Atlantis
It was during the reign of Henry VI that Edward Radcliffe and his followers left Hastings, England for Atlantis.

Henry was removed from the throne in 1461, and replaced by Edward IV, with the support of the Earl of Warwick.