| Notes |
- Earl of Strathearn, Earl of Sussex, The Complete Peerage volume XII, page1, pages 516-517.
The Complete Peerage volume XII, page I, page 508-511.
John de Warren, surnamed Plantaganet, Earl of Warren and Surrey, succeeded his grandfather. In the 34th year of King Edward I., when Prince Edward was knighted with great solemnity, Earl John with 200 other noblemen of distinction had the honor of knighthood conferred upon him. The king made him a free grant of the castle and honor of Peke in Derbyshire, with the whole forest of High Peke, to hold during his lifetime. In the 5th year of King Edward II. he and the Earl of Pembroke besieged Piers Gaveston in Scarborough Castle and forced him to surrender. Later he was one of those who surrounded the Castle of Pontefract when it was held by Thomas, Earl of Lancaster, and his followers, and was among those who sat in judgment upon him and condemned him to death. He died June 30, 1347, at the age of 61 years. By his first wife, Joane, daughter of the Count of Barre, he had no children. By Maud Nerford he had three sons and three daughters.
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1286 - 1347 (60 years)
