Gilbert de Clare, 4th Earl of Hertford
|Gilbert de Clare|
4th Earl of Hertford
5th Earl of Gloucester
1st Lord Marcher of Glamorgan
6th Lord Marcher of Cardigan
7th Baron of Clare
Arms of the de Clare Family
|Earl of Hereford|
Earl of Gloucester
|Predecessor||Richard de Clare, 3rd Earl of Hertford|
|Successor||Richard de Clare, 5th Earl of Hertford|
|Spouse||Isabel Marshal, 7th Countess of Pembroke|
|Family||House de Clare|
|Father||Richard de Clare, 3rd Earl of Hertford|
|Mother||Amice Fitz William, suo jure Countess of Gloucester|
Hertford, Hertfordshire, Kingdom of England
|Died||25 October 1230|
Brittany, Kingdom of France
|Occupation||Peerage of England|
Gilbert de Clare, 4th Earl of Hertford, 5th Earl of Gloucester, 1st Lord of Glamorgan, 7th Baron of Clare (1180-1230) was the son of Richard de Clare, 3rd Earl of Hertford (1153–1217) by his wife Amice Fitz William (1160-1225), daughter of William Fitz Robert, 2nd Earl of Gloucester (1125-1183) and his wife Hawise de Beaumont (1120-1197). He married Isabel Marshal, 7th Countess of Pembroke (1200-1240), daughter of Sir William Marhsal, Knight by his wife Isabel de Clare, 4th Countess of Pembroke, and had six childen y that marriage. He also inherited from his mother the estates of Gloucester and the honour of St. Hilary, and from Rohese de Giffard, an ancestor, the moiety of the Giffard estates. In June 1202, he was entrusted with the lands of Harfleur and Montrevillers. He never held the Earldom of Pembroke or Marcher Lordship of Striguil Jure Uxoris.
In 1215 Gilbert de Clare and his father Richard de Clare were two of the Magna Carta sureties and championed Louis VIII of France in the First Barons' War, fighting at Lincoln, England under the baronial banner. He was taken prisoner in 1217 by William Marshal, whose daughter Isabel Marshal he later married on 9 October, her 17th birthday. In 1223 he accompanied his brother-in-law, William Marshal, 2nd Earl of Pembroke, in an expedition into Wales. In 1225 he was present at the confirmation of the Magna Carta by King Henry III of England. 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 Cranborne to Tewkesbury. His widow Isabel later married Richard Plantagenet, Earl of Cornwall & King of the Romans.
Gilbert de Clare married once to Isabel Marshal, 7th Countess of Pembroke, daughter of Sir William Marshal, Knight and Isabel de Clare, 4th Countess of Pembroke (1172–1220), and had six children by that marriage:
- Agnes de Clare (1218)
- Amice de Clare (1220-1287); married Baldwin de Redvers, 6th Earl of Devon
- Richard de Clare, 5th Earl of Hertford (1222-1262) Heir
- Isabel de Clare (1226-1264); married Robert de Brus, 5th Lord of Annandale
- William de Clare (1228-1258); married Margery de Burgh (1225-1252)
- Gilbert de Clare (1229)
- Hall, H. (1913). The Marshal Pedigree. The Journal of the Royal Society of Antiquaries of Ireland, 3(1), 1-29.
- Hollister, C. W. (1973). The strange death of William Rufus. Speculum, 48(4), 637-653.
- Malden, H. E. (1924). Devereux Papers with Richard Broughton's Memoranda (1575–1601). Camden Third Series, 34, 1-36.
- Ward, J. C. (1981). Fashions in monastic endowment: the foundations of the Clare family, 1066–1314. The Journal of Ecclesiastical History, 32(4), 427-451.