Henry, 3rd Earl of Leicester and Lancaster (c. 1281 – 22 September 1345) was an English nobleman. He was the grandson of King Henry III of England (r. 1216–1272) and was one of the principals behind the deposition of King Edward II (r. 1307–1327), his first cousin.
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Origins
He was the younger son of Edmund Crouchback, 1st Earl of Lancaster, Earl of Leicester, a son of King Henry III by his wife Eleanor of Provence. The Earl Henry's mother was Blanche of Artois, Queen Dowager of Navarre. Through his mother, he was a half-brother of Queen Joan I of Navarre.