Elizabeth Burgh Duchess of Clarence was appointed 4th Earl Ulster.

On 16 Nov 1327 [her father] William Donn Burgh 3rd Earl Ulster (age 15) and [her mother] Maud Plantagenet Countess Ulster (age 17) were married. She by marriage Countess Ulster. She the daughter of [her grandfather] Henry Plantagenet 3rd Earl of Leicester 3rd Earl Lancaster (age 46) and [her grandmother] Maud Chaworth. They were second cousin once removed. He a great grandson of King Edward I of England. She a great granddaughter of King Henry III of England.

On 06 Jul 1332 Elizabeth Burgh Duchess of Clarence was born to William Donn Burgh 3rd Earl Ulster (age 19) and Maud Plantagenet Countess Ulster (age 22) at Carrickfergus Castle, Carrickfergus, County Antrim. She a great x 2 granddaughter of King Henry III of England.

On 06 Jun 1333 [her father] William Donn Burgh 3rd Earl Ulster (age 20) was murdered by Richard de Mandeville in revenge for the murder of Richard's wife's brother Walter Liath de Burgh the year before. Baron Burgh extinct.

Annals of Ulster 1333. 06 Jun 1333. [her father] William Burke, Earl of Ulster (age 20)², was killed by the English of Ulster. The Englishmen who committed this deed were put to death, in divers ways, by the people of the King of England; some were hanged, others killed, and others torn asunder², in revenge of his death.

Note 1. Earl of Ulster. There is a much more circumstantial account of the death of this Earl of Ulster given by Pembridge and Grace under this year. Lodge gives the following particulars of it: "He was murdered on Sunday, June 6, 1333, by Robert Fitz-Richard Mandeville (who gave him his first wound), and others his servants, near to the Fords, in going towards Carrickfergus, in the 21 st year of his age, at the instigation, as was said, of Gyle de Burgh, wife of Sir Richard Mandeville, in revenge for his having imprisoned her brother Walter and others."

This young earl left an only child, Elizabeth, who was married in the year 1352 to [her future husband] Lionel, third son of King Edward III., and this prince was then created, in her right, Earl of Ulster and Lord of Connaught, and these titles were enjoyed through marriage or descent by different princes of the royal blood, until at length, in the person of Edward IV, they became the special inheritance and revenue of the crown of England. Immediately on the Earl's death the chiefs of the junior branches of the family of Burke or De Burgo, then seated in Connaught, fearing the transfer of his possessions into strange hands by the marriage of the heiress, seized upon his estates in Connaught. The two most powerful of these were Sir William or Ulick, the ancestor of the Earls of Clanrickard, and Sir Edmund Albanagh the progenitor of the Viscounts of Mayo. These having confederated together and declared themselves independent, renounced the English dress and language, and adopted Irish names, Sir William taking the name of Mac William Oughter, or the Upper, and Sir Edmund that of Mac William Eighter, or the Lower. Under these names these two powerful chieftains tyranized over the entire province of Counaught, and though Lionel Duke of Clai'ence, in right of his wife, laid claim to their usurped possessions, the government apears to have been too weak to assert, the authority of the English laws, so that the territories of the Burkes were allowed to descend in course of tanistry and gavelkind. See Hardiman's History of Galway, pp. 56, 57.

Note 2. Torn asunder, i.e. torn limb from limb. Mageoghegan renders it "hanged, drawn, and quartered."

In or before 1345 [her step-father] Ralph Ufford (age 42) and [her mother] Maud Plantagenet Countess Ulster (age 34) were married. She the daughter of [her grandfather] Henry Plantagenet 3rd Earl of Leicester 3rd Earl Lancaster (age 63) and [her grandmother] Maud Chaworth. She a great granddaughter of King Henry III of England.

In 1352 Lionel Plantagenet 1st Duke of Clarence (age 13) and Elizabeth Burgh Duchess of Clarence (age 19) were married. He by marriage Earl Ulster. She was the sole heir of her father and brought the de Burgh inheritance of the lands of Ulster to the marriage. As a consequence of their earlier betrothal he had been called Earl Ulster since 1347. She the daughter of William Donn Burgh 3rd Earl Ulster and Maud Plantagenet Countess Ulster (age 42). He the son of King Edward III of England (age 39) and Philippa of Hainault Queen Consort England (age 37). They were half second cousin once removed. She a great x 2 granddaughter of King Henry III of England.

On 16 Aug 1355 [her daughter] Philippa Plantagenet Countess March 5th Countess Ulster was born to [her husband] Lionel Plantagenet 1st Duke of Clarence (age 16) and Elizabeth Burgh Duchess of Clarence (age 23) at Eltham Palace, Kent [Map]. At the time of her birth she was Heir to the Throne of England since her uncle [her brother-in-law] Edward "Black Prince" (age 25) was yet to be married. She a granddaughter of King Edward III of England. Coefficient of inbreeding 2.22%.

Archaeologia Volume 35 1853 XXXIII. On the 20th [Aug 1358], the Countess of Ulster (age 26) (heiress of [her father] William de Burgh, Earl of Ulster, and wife of [her husband] Lionel (age 19), son of Edward III.) arrived to supper.

In 1362 [her brother-in-law] Edmund of Langley 1st Duke of York (age 20) was created 1st Earl Cambridge.

On 10 Apr 1362 Maud Plantagenet Duchess Lower Bavaria (age 22) died. Her sister Blanche Duchess of Lancaster (age 20) succeeded 6th Countess of Leicester. [her brother-in-law] John of Gaunt 1st Duke Lancaster (age 22) by marriage Earl of Leicester adding a fourth Earldom to the ones he already held: Earl Richmond, Earl Lancaster and Earl Derby.

On 28 May 1363 John Harrington 2nd Baron Harington (age 35) died at Gleaston Castle [Map]. His son Robert Harrington 3rd Baron Harington (age 7) succeeded 3rd Baron Harington. Given his young age Robert Harrington 3rd Baron Harington became a ward of [her father-in-law] King Edward III of England (age 50) who granted his wardship to his daughter [her sister-in-law] Isabella Countess Bedford and Soissons (age 30) and her husband Enguerrand de Coucy 1st Earl Bedford 1st Count Soissons (age 23).

On 10 Dec 1363 Elizabeth Burgh Duchess of Clarence (age 31) died at Dublin [Map]. She was buried at Clare Priory, Suffolk [Map].

In Jun 1368 [her former husband] Lionel Plantagenet 1st Duke of Clarence (age 29) and Violante Visconti (age 14) were married in the Church of Santa Maria Maggiore, Milan [Map]. The wedding festivities were lavish and ostentatious. The banquet, held outside, included 30 courses of meat and fish presented fully gilded. Between the courses the guests were given gifts such as suits of armor, bolts of cloth, war horses, arms, and hunting dogs. Among the guests were Geoffrey Chaucer (age 25), Petrarch, Jean Froissart and John Hawkwood. He the son of [her former father-in-law] King Edward III of England (age 55) and [her former mother-in-law] Philippa of Hainault Queen Consort England (age 53).

On 07 Oct 1368 [her former husband] Lionel Plantagenet 1st Duke of Clarence (age 29) died from poisoning at Alba [Map]. Duke Clarence extinct. He was buried at the St Pietro Ciel d'Oro Church, Pavia [Map].

There was strong speculation he had been poisoned by his wife's (age 14) father (age 48).