After 14 Jul 1306 [her father] Hugh "Younger" Despencer 1st Baron Despencer (age 20) and [her mother] Eleanor Clare Baroness Zouche Mortimer (age 13) were married. She the daughter of [her grandfather] Gilbert "Red Earl" Clare 7th Earl Gloucester 6th Earl Hertford and [her grandmother] Joan of Acre Countess Gloucester and Hertford (age 34). He the son of [her grandfather] Hugh "Elder" Despencer 1st Earl Winchester (age 45) and [her grandmother] Isabella Beauchamp Baroness Monthermer. They were third cousin once removed. He a great x 5 grandson of King Henry I "Beauclerc" England. She a granddaughter of King Edward I of England.

In 1312 Isabel Despencer Countess Arundel was born to Hugh "Younger" Despencer 1st Baron Despencer (age 26) and Eleanor Clare Baroness Zouche Mortimer (age 19). She a great granddaughter of King Edward I of England.

After 15 Sep 1317 [her step-father] William Zouche 1st Baron Zouche Mortimer (age 52) and [her mother] Eleanor Clare Baroness Zouche Mortimer (age 24) were married. The difference in their ages was 27 years. She the daughter of [her grandfather] Gilbert "Red Earl" Clare 7th Earl Gloucester 6th Earl Hertford and [her grandmother] Joan of Acre Countess Gloucester and Hertford. She a granddaughter of King Edward I of England.

On 09 Feb 1321 Richard Fitzalan 10th Earl of Arundel 8th Earl of Surrey (age 15) and Isabel Despencer Countess Arundel (age 9) were married at Havering atte Bower, Essex [Map]. She by marriage Countess Arundel Sussex. He the son of Edmund Fitzalan 9th Earl of Arundel (age 35) and Alice Warenne Countess Arundel. They were half third cousin once removed. He a great x 5 grandson of King John of England. She a great granddaughter of King Edward I of England.

In 1325 John Bohun 5th Earl Hereford 4th Earl Essex (age 18) and [her sister-in-law] Alice Fitzalan Countess Essex and Hereford were married. She by marriage Countess Essex, Countess Hereford. She the daughter of [her father-in-law] Edmund Fitzalan 9th Earl of Arundel (age 39) and Alice Warenne Countess Arundel. He the son of Humphrey Bohun 4th Earl Hereford 3rd Earl Essex and Princess Elizabeth of Rhuddlan Countess Essex, Hereford and Holland. They were half third cousins. He a grandson of King Edward I of England. She a great x 5 granddaughter of King John of England.

In 1326 [her sister-in-law] Alice Fitzalan Countess Essex and Hereford died.

Froissart Book 1 Chapter 11. Oct 1326. AND then this tiding spread about the realm so much, that at the last it came to the knowledge of the lords by whom the queen (age 31) was called again into England. And they apparelled them in all haste to come to Edward (age 13) her son, whom they would have to their sovereign lord. And the first that came and gave them most comfort was Henry earl of Lancaster (age 45) with the wry neck, called Tort Col, who was brother to Thomas earl of Lancaster, beheaded as ye have heard herebefore, who was a good knight and greatly recommended, as ye shall hear after in this history. This earl Henry came to the queen with great company of men of war, and after him came from one part and other earls, barons, knights and squires, with so much people that they thought them clean out of perils, and always increased their power as they went forward. Then they took counsel among them that they should ride straight to the town of Bristow [Map], whereas the king (age 42) was, and with him the Spencers. The which was a good town and a strong, and well closed, standing on a good port of the sea, and a strong castle, the sea beating round about it. And therein was the king and [her grandfather] Sir Hugh Spencer the elder (age 65), who was about ninety of age, and [her father] Sir Hugh Spencer (age 40) his son, who was chief governour of the king and counselled him in all his evil deeds. Also there was the [her husband] earl of Arundel (age 20), who had wedded the daughter (age 14) of sir Hugh Spencer, and di at Bristow, and besieged the town round about as near as they might: and the king and sir Hugh Spencer the younger held them in the castle [Map], and the old sir Hugh Spencer and the [her father-in-law] earl of Arundel (age 41) held them in the town. And when the people of the town saw the great power that the queen was of (for almost all England was of her accord), and perceived what peril and danger evidently they were in, they took counsel among themselves and determined that they would yield up the town to the queen, so that their lives and goods might be saved. And so they sent to treat with the queen and her council in this matter; but the queen nor her council would not agree thereto without she might do with sir Hugh Spencer and with the earl of Arundel what it pleased her. When the people of the town saw they could have no peace otherwise, nor save the town nor their goods nor their lives, in that distress they accorded to the queen and opened the gates, so that the queen and sir John of Hainault (age 38), and all her barons, knights and squires, entered into the town and took their lodgings within, as many as might, and the residue without. Then sir Hugh Spencer and the earl of Arundel were taken and brought before the queen, to do her pleasure with them. Then there was brought to the queen her own children, John her son (age 10) and her two daughters [Note. Eleanor of Woodstock Plantagenet (age 8) and Joan of the Tower Queen Consort Scotland (age 5)], the which were found there in the keeping of the said sir Hugh Spencer, whereof the queen had great joy, for she had not seen them long 'before. Then the king might have great sorrow and sir Hugh Spencer the younger, who were fast enclosed in the strong castle, and the most part of all the realm turned to the queen's part and to Edward her eldest son.

Around 1327 [her son] Edmund Fitzalan was born to [her husband] Richard Fitzalan 10th Earl of Arundel 8th Earl of Surrey (age 21) and Isabel Despencer Countess Arundel (age 15). He a great x 2 grandson of King Edward I of England.

On 30 Jun 1337 [her mother] Eleanor Clare Baroness Zouche Mortimer (age 44) died.

14 Dec 1344 Richard Fitzalan 10th Earl of Arundel 8th Earl of Surrey (age 38) and Isabel Despencer Countess Arundel (age 32) marriage annulled by Pope Clement VI on the grounds that he had never freely consented to marry Isabel. He, at this time, is believed to be having an affair with her first cousin Eleanor (age 26) who he married four months later.

On 05 Apr 1345 [her former husband] Richard Fitzalan 10th Earl of Arundel 8th Earl of Surrey (age 39) and Eleanor Plantagenet Countess Arundel and Surrey (age 26) were married at Ditton Church, Stoke Poges. She by marriage Countess Arundel Sussex. She the daughter of Henry Plantagenet 3rd Earl of Leicester 3rd Earl Lancaster (age 64) and [her aunt] Maud Chaworth. He the son of [her former father-in-law] Edmund Fitzalan 9th Earl of Arundel and Alice Warenne Countess Arundel. They were half third cousins. He a great x 5 grandson of King John of England. She a great granddaughter of King Henry III of England.

Before 16 Jul 1347 [her son] Edmund Fitzalan (age 20) and [her daughter-in-law] Sybil Montagu (age 17) were married. She the daughter of William Montagu 1st Earl Salisbury (age 46) and Catherine Grandison Countess of Salisbury (age 43). He the son of [her former husband] Richard Fitzalan 10th Earl of Arundel 8th Earl of Surrey (age 41) and Isabel Despencer Countess Arundel (age 35). He a great x 2 grandson of King Edward I of England.

In 1356 Isabel Despencer Countess Arundel (age 44) died.

On 24 Jan 1376 [her former husband] Richard Fitzalan 10th Earl of Arundel 8th Earl of Surrey (age 70) died. He was buried at Lewes Priory [Map]. His son Richard Fitzalan 9th Earl of Surrey 11th Earl of Arundel (age 30) succeeded 9th Earl Surrey, 11th Earl Arundel Sussex. Elizabeth Bohun Countess Arundel and Surrey (age 26) by marriage Countess Arundel Sussex, Countess Surrey.