Richard de Clare, Magna Charta Surety 1215, d. bet. 30 Oct & 28 Nov 1217,Earl of Hertford, son of Roger de Clare, Earl of Hertford, and Maud,daughter of James de St Hilary; m. Amice, Countess of Gloucester, d. 1Jan 1224/5, daughter & heir of Williamd fitz Robert, Earl of Gloucester,and Hawise de Beaumont. [Magna Charta Sureties}
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Richard de Clare, 4th Earl of Hertford, who in the 7th Richard I gave1000 pounds to the king for livery of the lands of his mother'sinheritance with his proportion of those sometime belonging to Giffard,Earl of Buckingham. His lordship m. Amicia, 2nd dau, and co-heiress(with her sisters Mabell, wife of the Earl of Evereux, in Normandy, andIsabel, the divorced wife of King John) of William, Earl of Gloucester,by who he had issue, Gilbert, his successor, and Joan, m. to Rhys-Grig,Prince of South Wales. This earl, who was one of the twenty-five baronsappointed to enforce the Magna Carta, d. in 1218, and was s. by his son,Gilbert de Clare, 5th Earl of Hertford. [Sir Bernard Burke, "Dormant andExtinct Peerages", Burke's Peerage, London, 1883, p 119, Clare, Lords ofClare, Earls of Hertford, Earls of Gloucester]
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From the National Society Magna Chart Dames and Barons; Magna ChartaBaron Page for Richard De Clare, Earl of Hertford:
Richard de Clare, the Surety, was the fourth Earl of Hertford but, likehis father and uncle, was more generally known as Earl of Clare. He waspresent at the Coronation of King Richard I at Westminster, 3 September1189, and of King John, 27 May 1199. He sided with the Barons againstKing John, and his Castle at Tonbridge was taken. On 9 November 1215 hewas one of the commissioners who, on the part of the Barons, was to treatof peace with the King. On 4 March 1215/6 his lands in countiesCambridge, Norfolk, Suffolk; and Essex were granted to Robert de Betun;he and his son were among the Barons excommunicated by the Pope in 1215.He died between 3 October and 28 November 1217. He married Amicia,Countess of Gloucester, second daughter of William FitzRobert, Earl ofGloucester, and his wife Hawise, daughter of Robert de Beaumont, Earl ofLeicester. She died 1 January 1224/5.