See also
1. William FitzRobert, 2nd Earl of Gloucester, son of Robert, 1st Earl of Gloucester (1090-1147) and Mabel of Gloucester ( -1156), was born on 23 November 1116. He died on 23 November 1183. He married Hawise de Beaumont of Leicester.
William Fitz Robert, 2nd Earl of Gloucester (died 1183) was the son and heir of Sir Robert de Caen, 1st Earl of Gloucester, and Mabel of Gloucester, daughter of Robert Fitzhamon. His father was an illegitimate son of King Henry I of England, thus William was a nephew of the Empress Maud and a cousin of King Stephen, the principal combatants of the English Anarchy period.
In October 1141, William looked after the baronial estates, when his father fell into the hands of partisans at Winchester. His father was exchanged for King Stephen, and during his father's absence in Normandy in 1144 he served as Governor of Wareham. In 1147, he overthrew Henry de Tracy at Castle Cary. In 1154 he made an alliance with Roger de Clare, 3rd Earl of Hertford, by which they agreed to aid each other against all men except Henry II of England. He was lord of the manor of Glamorgan, as well as Caerleon, residing chiefly at Cardiff. It was there that in 1158 he and his wife and son were captured by Ivor the Little and carried away into the woods, where they were held as prisoners until the Earl redressed Ivor's grievances. In 1173 he took the King's part against his sons, but thereafter he appears to have fallen under suspicion, for the following year he submitted to the King, and in 1175 surrendered to him Bristol Castle. Because his only son and heir Robert died in 1166, Earl William made John, the younger son of King Henry II, heir to his earldom, in conformity with the King's promise that John should marry one of the Earl's daughters, if the Church would allow it, they being related in the third degree. Earl William was present in March 1177 when the King arbitrated between the Kings of Castile and Navarre, and in 1178, he witnessed Henry's charter to Waltham Abbey. But during the King's struggles with his sons, when he imprisoned a number of magnates of whose loyalty he was doubtful, Earl William was among them. He died on his birthday in 1183; his wife Hawise survived him.
Hawise de Beaumont of Leicester was the daughter of Robert de Beaumont, 2nd Earl of Leicester (1104-1168) and Amice de Montfort ( - ). She and William FitzRobert, 2nd Earl of Gloucester had the following children:
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2. Amice FITZROBERT, daughter of William FitzRobert, 2nd Earl of Gloucester and Hawise de Beaumont of Leicester, was born circa 1160. She married Richard de Clare, 4th Earl of Hertford circa 1172. She died in 1220.
Richard de Clare, 4th Earl of Hertford, son of Roger de Clare, 3rd Earl of Hertford (1116-1173) and Maud de St. Hilary (c. 1133-1193), was born in 1162. He was an Owner of Tonbridge Castle. He died on 30 December 1218. He and Amice FITZROBERT had the following children:
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3. Gilbert de Clare, 5th Earl of Hertford, son of Richard de Clare, 4th Earl of Hertford and Amice FITZROBERT, was born in 1180. He died on 25 October 1230. He married Lady Isabella Marshal of Pembroke.
Gilbert de Clare, 5th Earl of Hertford (1180 – October 25, 1230) was the son of Richard de Clare, 4th Earl of Hertford, from whom he inherited the Clare estates, from his mother, Amice Fitz Robert, the estates of Gloucester and the honour of St. Hilary, and from Rohese, an ancestor, the moiety of the Giffard estates. In June 1202, he was entrusted with the lands of Harfleur and Montrevillers.
In 1215 Gilbert and his father were two of the barons made Magna Carta sureties and championed Louis "le Dauphin" of France in the First Barons' War, fighting at Lincoln under the baronial banner. He was taken prisoner in 1217 by William Marshal, whose daughter Isabella he later married. In 1223 he accompanied his brother-in-law, Earl Marshal in an expedition into Wales. In 1225 he was present at the confirmation of the Magna Carta by Henry III. In 1228 he led an army against the Welsh, capturing Morgan Gam, who was released the next year. He then joined in an expedition to Brittany, but died on his way back to Penrose in that duchy. His body was conveyed home by way of Plymouth and Cranbourgh to Tewkesbury. His widow Isabel later married Richard Plantagenet, Earl of Cornwall & King of the Romans. His own arms were: Or, three chevronels gules.
Lady Isabella Marshal of Pembroke and Gilbert de Clare, 5th Earl of Hertford had the following children:
| 4 | Isabella de Clare (1226-1264). Isabella was born on 8 November 1226 in Gloucestershire. She married Robert de Brus, 5th Lord Annandale on 12 May 1240. She died on 10 July 1264. |