He inherited the title on the death of his elder brother Baldwin de Redvers, 3rd Earl of Devon, who died childless.
Devon | 3rd Rock from the Sun | James Earl Jones | Prince Edward, Earl of Wessex | Louis Mountbatten, 1st Earl Mountbatten of Burma | Herbert Kitchener, 1st Earl Kitchener | Earl | Frederick Roberts, 1st Earl Roberts | Baldwin | Alec Baldwin | Earl of Derby | James Baldwin | Earl Warren | Stanley Baldwin | Earl of Pembroke | Baldwin Locomotive Works | Robert Harley, 1st Earl of Oxford and Earl Mortimer | Earl of Warwick | South Carolina's 3rd congressional district | Thomas Wentworth, 1st Earl of Strafford | Robert Gascoyne-Cecil, 3rd Marquess of Salisbury | Edward Smith-Stanley, 14th Earl of Derby | Earl of Shrewsbury | William Pitt, 1st Earl of Chatham | Simon de Montfort, 6th Earl of Leicester | Michigan's 3rd congressional district | Devonport, Devon | Tiverton, Devon | Thomas Fairfax, 3rd Lord Fairfax of Cameron | Richard Neville, 16th Earl of Warwick |
and Lord of the Isle (of Wight) (1217 – 15 February 1245) was the son of Baldwin de Redvers and Margaret FitzGerold and grandson of William de Redvers, 5th Earl of Devon.