Lady Isabella de Clare of Gloucester

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Lady Isabella of Gloucester and Hertford (de Clare)

Also Known As: "Isabella", "Lady of Hertford and Gloucester", "Isabelle"
Birthplace: Tewkesbury, Gloucestershire, England
Death: July 10, 1264 (37)
Cleveland, Yorkshire, England
Place of Burial: England, United Kingdom
Immediate Family:

Daughter of Gilbert de Clare, 4th Earl of Hertford, 5th Earl of Gloucester, Surety of the Magna Carta and Isabel Marshal, Countess of Cornwall
Wife of Robert de Brus, 5th Lord of Annandale
Mother of Robert de Bruce, 6th Lord of Annandale; Isabella de Bruce; William de Brus; Bernard de Brus; John de Brus and 1 other
Sister of Agnes de Clare; Amice de Clare, of Gloucester; Richard de Clare, 6th Earl of Gloucester; William de Clare and Gilbert de Clare, Earl de Clare
Half sister of Robert de Clare; John of Cornwall; Henry of Almaine; Nicholas of Cornwall and Isabella (Plantagenet) of Cornwall

Managed by: James Fred Patin, Jr.
Last Updated:

About Lady Isabella de Clare of Gloucester

Isabel de Clare

From Medlands:

ISABEL de Clare (2 Nov 1226-after 10 Jul 1264). The Chronica de Fundatoribus et Fundatione of Tewkesbury Abbey records the births of “duas filias, Agnetam et Isabellam” to “Gilberto…Gloucestriæ et Hertfordiæ comes” and his wife “domina Isabella filia Willielmi Marescalli senioris, comitis de Pembroke”, after the birth of their older brothers[2001]. The Annals of Tewkesbury record the birth “IV Non Nov” in 1226 of “Gileberto de Clare comiti Glocestriæ…filia Ysabel”[2002]. The Annals of Tewkesbury record the marriage in May 1240 of “Isabella filia G. quondam comitis Gloucestriæ” and “Roberto de Brus”[2003]. A charter dated 18 Jun 1240 records that "the town of Rip" was given "as a marriage portion to Robert de Brus with Isabel, daughter of the earl of Gloucerster…the earl’s [G. Marshal Earl of Pembroke] niece"[2004]. m (May 1240) as his first wife, ROBERT de Brus, son of ROBERT de Brus "the Noble" Lord of Annandale & his wife Isabel of Huntingdon (-Lochmaben Castle 31 Mar 1295, bur 17 Apr Guisborough Priory). He succeeded his father in 1245 as Lord of Annandale.

Robert [V] & his first wife had two children:

1. ROBERT [VI] Bruce (Jul 1243-shortly before 4 Apr 1304, bur Abbey of Holm Cultram). The Annals of Tewkesbury record the birth in Jul 1243 of “filium nomine ---” to “Isabel de Clara…[et] R. de Brus”[1035]. The manuscript history of the Bruce family of Carleton records that “Robertus Brus quartus” succeeded “Robertus Brus tertius”[1036]. He succeeded his father in 1295 as Lord of Annandale.

2. RICHARD Bruce (-before 25 Jan 1287). Inquisitions following a writ dated 25 Jan "15 Edw I" following the death of "Richard de Brus...” record that his lands “ought to revert to Sir Robert his father...he died without heir of himself as he never took a wife”[1037]. A writ dated 6 May 1287 ordered the restitution of the lands of "Ricardum de Bruse" deceased to "Roberti de Bruse patri sui"[1038].

Isabella of Gloucester and Hertford

From Wikipedia:

  • Isabella of Gloucester and Hertford
  • Lady of Annandale and Ireby
  • Spouse(s) Robert de Brus, 5th Lord of Annandale
  • Issue
  • Robert VI the Bruce, Earl of Carrick
  • Lady Isabella FitzMarmaduke
  • Lady Constance Scot de Calverley
  • Richard Bruce
  • Sir Bernard Bruce
  • William Bruce
  • Father Gilbert de Clare, 4th Earl of Hertford
  • Mother Isabel Marshal
  • Born 2 November 1226
  • Died 10 July 1264

Isabella de Clare (2 November 1226 – 10 July 1264) was the daughter of Gilbert de Clare, 4th Earl of Hertford and 5th Earl of Gloucester and Isabel Marshal. She is also known as Isabel de Clare, but this is however, the name of many women in her family.


Isabella's maternal grandparents were William Marshal, 1st Earl of Pembroke and his wife Isabel de Clare, 4th Countess of Pembroke. Isabella's paternal grandparents were Richard de Clare, 3rd Earl of Hertford and Amice FitzRobert.

Isabella was the fourth of six children, her brother was Richard de Clare, 6th Earl of Hertford. Her sister, Amice de Clare married Baldwin de Redvers, 6th Earl of Devon and was mother of Baldwin de Redvers, 7th Earl of Devon and Isabella de Fortibus, Countess of Devon.


Isabella was married on 12 May 1240 (at age thirteen and a half) to Robert de Brus, 5th Lord of Annandale. Isabella brought to him the village of Ripe, in Sussex. Her husband was a candidate to become King of Scotland, after the death of the young Margaret, Maid of Norway. Her husband did not however succeed; Robert's rival, John Balliol was elected King of Scotland in 1292.

Robert and Isabella had up to six children:

  1. Robert (1243–1304)
  2. William, married Elizabeth de Sully, without issue
  3. Bernard, married firstly Alicia de Clare and married secondly Constance de Morleyn
  4. Richard (died before 26 January 1287)
  5. Isabella (1249 – c. 1284), married (as his first wife) Sir John FitzMarmaduke, Isabel was buried at Easington, county Durham.

John Balliol's time as King of Scotland did not last long, he died in 1314. Isabella's grandson, Robert the Bruce became King of Scotland. Isabella did not however get to see this day, she died in 1264, aged thirty seven. Her husband married a second time, to Christina de Ireby, this marriage produced no children.

Despite claims to the contrary by amateur genealogists, there is no evidence that Isabella had other children.

ID: I08758 Name: Isabella de Clare Sex: F Birth: 2 NOV 1226 Death: AFT 10 JUL 1264 Reference Number: 8758 Note: Isabel de Clare was daughter of Gilbert de Clare, 3rd Earl of Gloucester and Hereford.1 She was born circa 1224. She was the daughter of Gilbert (de Clare), 4th Earl of Gloucester and Hertford and Isabella Marshall.1 She married Robert V "the Competitor", 5th Lord of Annandale, son of Robert IV, 4th Lord of Annandale and Isobel MacCrinan, in May 1240.1,2

Child of Isabel de Clare and Robert V "the Competitor", 5th Lord of Annandale: Robert VI "le Veil", 3rd Earl of Carrick+ b. c 1249, d. 1304

[S484] Peter Townend, editor, Burke's Genealogical and Heraldic History of the Peerage, Baronetage, and Knightage, One Hundred and Fifth Edition (London: Burke's Peerage Limited, MCMLXX (1970)), Kings of Scotland, pgs. lxx-lxxv. Hereinafter cited as B:P, 105th. [S932] Ronald McNair Scott, Robert the Bruce, King of Scots (New York: Peter Bedrick Books, 1982), pg. 11. Hereinafter cited as Robert the Bruce.


Born: 2 Nov 1226, Tewksbury, Gloucestershire, England Married (1): May 1240-1244, Scotland Died: After 10 Jul 1264, Cleveland, Yorkshire, Scotland

Ancestral File Number: 8WKL-7K.

General Notes: Earl Gilbert's other daughter, Isabel born 1226, married 1240 the Scots baron Robert Bruce, lord of Annandale (d 1295), and by him was the grandmother of the hero of Bannockburn. Her marriage was probably arranged by her mother Isabel and uncle, Gilbert Marshal who gave her the Sussex manor of Ripe as a marriage portion. Isabel de Clare, b. 2 Nov 1226, d. after 10 July 1264; m. as his 1st wife, May 1240 Sir Robert de Brus, b. 1210, d. Lochmaben Castle 31 Mar 1295, Lord of Anandale, son of Robert de Brus, d. 1251, and Isabella, daughter of David of Huntingdon and Maud of Chester. He m. (2) before 10 May 1275 Christian, daughter & heir of Sir William d'Irby, and widow, successivley of Sir Thomas de Lascelles who dsp bef Aug 1261, and Sir Adam de Gesemuth who d. between 27 July 1270 and 23 April 1274 [Magna Charta Sureties]

Marriage Information: Isabel married Robert V DE BRUS "the Competitor", Lord of Annandale, son of Robert IV DE BRUS 4th Lord of Annandale and Isabelle DE HUNTINGDON, in May 1240-1244 in Scotland. (Robert V DE BRUS "the Competitor", Lord of Annandale was born in 1210 in Annandale, Dumfriesshire, Scotland, died on 31 Mar 1295 in Loch Maben Castle, Dumfrieshire, Scotlandand was buried on 17 Apr 1295 in Guisburn, Cleveland, Yorkshire, England.)

Marriage Information: Isabel also married William DE BRAOSE Lord Bramber. (William DE BRAOSE Lord Bramber was born about 1230 and died before 6 Jan 1291.)

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Lady Isabella de Clare of Gloucester's Timeline

November 2, 1226
Tewkesbury, Gloucestershire, England
November 8, 1226
November 8, 1226
November 8, 1226
Gloucestershire, England
July 1243
Writtle, Essex, England (United Kingdom)
Annandale, Dumfriesshire, Scotland
Argyllshire, Scotland
Clackmannan, Clackmannanshire, Scotland
July 10, 1264
Age 37
Cleveland, Yorkshire, England