Family
 Gilbert de Clare, 5th Earl of Gloucester, 4th Earl of Hertford 1)Born 1180 Hertford, Hertfordshire, England Died 25 Oct 1230 Penrose, Bretagne, France, 49 or 50 years 2) Married/ Related to:  Isabella MarshalDaughter of William Marshal, 1st Earl of Pembroke and Isabella FitzGilbert de Clare, 4th Countess of Pembroke. Born 9 Oct 1200 Pembroke Castle, Pembroke, Pembrokeshire, Wales Died 17 Jan 1239/40 Berkhamsted Castle, Berkhamsted, Hertfordshire, England, approximately 38 years Children: | |||
Sources
1) Source: Exchequer: King's Remembrancer: Ancient Deeds, Series D "(Richard de Clare, 8th Earl of Clare, 6th Earl of Hertford), son of earl Gilbert to (Monkton) Farleigh Priory". External Linkhttps://discovery.nationalarchives.gov.uk/details/r/C5519149. Reference: E 210/5273 (Data from direct source)
2) Source: English Baronies: a Study of Their Origin and Descent, 1086-1327. Reference: Pages 34-35: Clare (Questionable reliability of evidence)
3) Source: Chancery: Inquisitions Post Mortem, Series I, Henry III "Richard de Clare, earl of Gloucester and Hertford...to the said keepers, dated 8 July, the king has granted to Gilbert de Clare, son and heir of Richard de Clare sometime earl of Gloucester, all the fruits of this autumn, viz.—of the 47th year of his reign, of all the lands, &c. which were his father's, for which he is to account at the king's exchequer, saving to William de Valencia, the king's brother,"Dated: 1262 Evidences that Richard is father of Gilbert.. External Link
https://www.british-history.ac.uk/inquis-post-mortem/vol1/pp149-165. Reference: C 132/27/5 (Data from direct source)
4) Source: Exchequer: Treasury of Receipt: Ancient Deeds, Series A "Demise by Thomas de Clare, brother of Gilbert de Clare, earl of Gloucester and Hereford, to Dame Rosamund, late the wife of Sir Geoffrey Marmyun, of land, etc. of the manor of Chakenden belonging to him by reason of his wardship of John son and heir of William Marmyun". Date: 31 March 1266. External Link
https://discovery.nationalarchives.gov.uk/details/r/C4947943. Reference: E 40/9184 (Data from direct source)
5) Source: Chancery: Inquisitions Post Mortem, Series I, Henry III "Richard de Clare, earl of Gloucester and Hertford...to the said keepers, dated 8 July, the king has granted to Gilbert de Clare, son and heir of Richard de Clare sometime earl of Gloucester, all the fruits of this autumn, viz.—of the 47th year of his reign, of all the lands, &c. which were his father's, for which he is to account at the king's exchequer, saving to William de Valencia, the king's brother,"Dated: 1262. External Link
https://www.british-history.ac.uk/inquis-post-mortem/vol1/pp149-165. Reference: C 132/27/5 (Data from secondary evidence)