Richard de , Earl Hertford & Gloucester CLARE

                   Gilbert de Clare, 5th Earl of Hertford, who, after the decease ofGeoffrey de Mandeville, Earl of Essex, the 2nd wife of Isabel, thedivorced wife of King John, and in her right Earl of Gloucester, and herown decease, s. p., as also the decease of Almarick D'Evereux, son of theEarl of Evereux by Mabell, the other co-heiress, who likewise succeededto the Earldom of Gloucester, became Earl of Gloucester, in right of hismother, Amicia, the other co-heiress. This nobleman was amongst theprincipal barons who took up arms against King John, and was appointedone of the twenty-five chosen to enforce the observance of Magna Carta.In the ensuing reign, still opposing the arbitrary proceedings of thecrown, he fought on the side of the barons at Lincoln, and was takenprisoner there by William Marshall, Earl of Pembroke; but he soonafterwards made his peace. His lordship m. Isabel (who m. after hisdecease, Richard, Earl of Cornwall, brother of King Henry III), one ofthe daus., and eventually co-heiress of William Mareschal, Earl ofPembroke, by whom he had issue, Richard, his successor; William; Amicia,m. to Baldwin de Redvers, 4th Earl of Devon; Agnes; Isabel, m. to Robertde Brus. The earl d. in 1229 and was s. by his eldest son, Richard deClare. [Sir Bernard Burke, Dormant and Extinct Peerages, Burke's Peerage,London, 1883, p. 119, Clare, Lords of Clare, Earls of Hertford, Earls ofGloucester]