Isabel de Beaumont, Duchess of Lancaster, of the

House of Brienne The County of Brienne was a medieval county in France centered on Brienne-le-Château. Counts of Brienne * Engelbert I * Engelbert II * Engelbert III * Engelbert IV * Walter I (? – c. 1090) * Erard I (c. 1090 – c. 1120?) * Walter II ...

( – 1361) was an English noblewoman, being the youngest daughter and child of Henry de Beaumont, Earl of Buchan and

Alice Comyn Alice Comyn, Earl of Buchan, Countess of Buchan, Lady Beaumont (1289 – 3 July 1349) was a Scottish noblewoman, a member of the powerful Comyn family which supported the House of Balliol, Balliols, claimants to the disputed Scottish throne agai ...

Family

Isabel was born in about 1320. She had nine older siblings, including John de Beaumont, 2nd Lord Beaumont. Isabel's paternal grandparents were Louis of Brienne, Viscount de Beaumont, and Agnes, Viscountess de Beaumont. Her maternal grandparents were Alexander Comyn, Sheriff of Aberdeen and Joan le Latimer. Louis of Brienne was a younger son of

John of Brienne John of Brienne ( 1170 – 19–23 March 1237), also known as John I, was King of Jerusalem from 1210 to 1225 and Latin Emperor of Constantinople from 1229 to 1237. He was the youngest son of Erard II of Brienne, a wealthy nobleman in Champag ...

by his third wife,

Berengaria of Leon Berengaria or Berenguela, the feminine form of the given name Berengar, may refer to: * Berengaria of Barcelona (1116–1149), queen consort of Castile, León and Galicia * Berengaria of Navarre (c.1165–1230), queen consort to Richard ...

while Alexander Comyn was a younger brother of

John Comyn, Earl of Buchan John Comyn, 3rd Earl of Buchan (circa 1260 – 1308) was a chief opponent of Robert the Bruce in the civil war that paralleled the War of Scottish Independence. He should not be confused with the better known John III Comyn, Lord of Badenoch ...

Marriage and children

She married

Henry of Grosmont, 1st Duke of Lancaster Henry of Grosmont, Duke of Lancaster (– 23 March 1361) was an English statesman, diplomat, soldier, and Christian writer. The owner of Bolingbroke Castle in Lincolnshire, Grosmont was a member of the House of Plantagenet, which was ruling o ...

in 1337. Isabel bore Henry two daughters who would eventually inherit their father's estates: *

Maud, Countess of Leicester Maud of Lancaster (4 April 1340 – 10 April 1362), also known as Matilda, Countess of Hainault, was a 14th-century English noblewoman who married into the Bavarian ducal family. The eldest daughter of Henry of Grosmont, 1st Duke of Lancaster ...

(4 April 1339 – 10 April 1362), married

William V, Count of Hainaut William I, Duke of Bavaria-Straubing (Frankfurt am Main, 1330–1389, Le Quesnoy), was the second son of Emperor Louis IV and Margaret II of Hainaut. He was also known as William V, Count of Holland, as William III, Count of Hainaut and as W ...

. Died without surviving issue. * Blanche, Countess of Lancaster (25 March 1345 – 12 September 1369), married

John of Gaunt John of Gaunt, Duke of Lancaster (6 March 1340 – 3 February 1399) was an English royal prince, military leader, and statesman. He was the fourth son (third to survive infancy as William of Hatfield died shortly after birth) of King Edward ...

, son of

Edward III of England Edward III (13 November 1312 – 21 June 1377), also known as Edward of Windsor before his accession, was King of England and Lord of Ireland from January 1327 until his death in 1377. He is noted for his military success and for restoring ro ...

, by whom she had three surviving children. Blanche inherited all her father's estates after the death of her sister. Isabel died of the

plague Plague or The Plague may refer to: Agriculture, fauna, and medicine *Plague (disease), a disease caused by ''Yersinia pestis'' * An epidemic of infectious disease (medical or agricultural) * A pandemic caused by such a disease * A swarm of pes ...

in 1361 at

Leicester Castle Leicester Castle is in the city of the same name in the English county of Leicestershire. The complex is situated in the west of Leicester City Centre, between Saint Nicholas Circle to the north and De Montfort University to the south. A large ...

. She was buried in Newark Abbey, Leicester. Her husband also died of the plague in March 1361. Through Blanche, Isabel was an ancestress of Englands's Royal

House of Lancaster The House of Lancaster was a cadet branch of the royal House of Plantagenet. The first house was created when King Henry III of England created the Earldom of Lancasterfrom which the house was namedfor his second son Edmund Crouchback in 126 ...

, with

Henry IV of England Henry IV ( April 1367 – 20 March 1413), also known as Henry Bolingbroke, was King of England from 1399 to 1413. He asserted the claim of his grandfather King Edward III, a maternal grandson of Philip IV of France, to the Kingdom of F ...

being her grandson. Philippa of Lancaster, Queen of Portugal and the Algarve and

Elizabeth of Lancaster, Duchess of Exeter Elizabeth of Lancaster (bf. 21 February 1363 – 24 November 1426) was the third child of John of Gaunt, 1st Duke of Lancaster, and his first wife Blanche of Lancaster. Elizabeth was made a Lady of the Garter in 1378. Life Some sources list her ...

were also her grandchildren. Daughters of Scottish earls Lancaster House of Brienne 1361 deaths Year of birth unknown 14th-century deaths from plague (disease) 14th-century English nobility 14th-century English women {{England-hist-stub