Gilbert de Clare, 5th Earl of Gloucester

Gilbert de Clare
4th Earl of Hertford
5th Earl of Gloucester
1st Lord of Glamorgan

Arms of the de Clare Family
Earl of Hereford
Earl of Gloucester

Predecessor Richard de Clare, 3rd Earl of Hertford
Successor Richard de Clare, 6th Earl of Gloucester
Spouse Isabel Marshal


Richard de Clare, 6th Earl of Gloucester
Isabel de Clare
Agnes de Clare
Amice de Clare
William de Clare
Gilbert de Clare

Titles and styles

7th Lord of Clare
7th Lord of Tonbridge
6th Lord of Cardigan
Family de Clare
Father Richard de Clare, 3rd Earl of Hertford
Mother Amice Fitz William, suo jure Countess of Gloucester
Born 1180
Hertford, Hertfordshire, England
Died 25 October 1230
Brittany, France
Occupation Peerage of England
The Seal of Gilbert de Clare

Gilbert de Clare, 4th Earl of Hertford, 5th Earl of Gloucester, 1st Lord of Glamorgan, 7th Lord of Clare (1180 25 October 1230) was the son of Richard de Clare, 3rd Earl of Hertford (c. 1153–1217), from whom he inherited the Clare estates. He also inherited from his mother, Amice Fitz William, 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.[1]


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 Isabel he later married on 9 October, her 17th birthday. 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 Cranborne to Tewkesbury. His widow Isabel later married Richard Plantagenet, Earl of Cornwall & King of the Romans. His own arms were: Or, three chevronels gules.


Gilbert de Clare had six children by his wife Isabel, née Marshal:[2]



  1.  "Clare, Gilbert de (d.1230)". Dictionary of National Biography. London: Smith, Elder & Co. 1885–1900.
  2. "Margaret de Burgh and others". Retrieved 2007-04-08.


Peerage of England
Preceded by
Richard de Clare
Earl of Hertford
Succeeded by
Richard de Clare
New creation Earl of Gloucester
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