In May 1406 [her father] Richard of Conisbrough 1st Earl Cambridge (age 20) and [her mother] Anne Mortimer (age 15) were married. The marriage apparently took place in secret possibly because she was a descendant of King Edward III of England although she wasn't at the time Heir to the Throne of England although their issue would become so. She died five years later. She the daughter of Roger Mortimer 4th Earl March 6th Earl Ulster and Eleanor Holland Countess March and Ulster. He the son of Edmund of Langley 1st Duke York and Isabella of Castile Duchess York. They were first cousin twice removed. He a grandson of King Edward III of England. She a great x 2 granddaughter of King Edward III of England.

After 21 Sep 1411 [her father] Richard of Conisbrough 1st Earl Cambridge (age 26) and [her step-mother] Maud Clifford Countess Cambridge (age 22) were married. He the son of Edmund of Langley 1st Duke York and Isabella of Castile Duchess York. He a grandson of King Edward III of England. She a great x 4 granddaughter of King Edward "Longshanks" I of England.

On 18 Feb 1413 Thomas Grey of Heton (age 9) and Isabel York Countess Eu and Essex (age 4) were married. She the daughter of Richard of Conisbrough 1st Earl Cambridge (age 27) and Anne Mortimer. They were fourth cousins. He a great x 4 grandson of King Edward "Longshanks" I of England. She a great granddaughter of King Edward III of England.

Before 25 Apr 1426 Henry Bourchier 2nd Count Eu 1st Earl Essex (age 22) and Isabel York Countess Eu and Essex (age 17) were married. She by marriage Countess Eu. She the daughter of Richard of Conisbrough 1st Earl Cambridge and Anne Mortimer. He the son of William Bourchier 1st Count Eu and Anne of Gloucester Plantagenet Countess Eu and Stafford (age 43). They were second cousins. He a great grandson of King Edward III of England. She a great granddaughter of King Edward III of England.

On 10 Dec 1427 [her brother-in-law] Ralph Grey (age 21) and Elizabeth Fitzhugh were married. She the daughter of Henry Fitzhugh 3rd Baron Fitzhugh and Elizabeth Grey Baroness Fitzhugh (age 63). He a great x 4 grandson of King Edward "Longshanks" I of England.

After 10 Oct 1441 [her brother-in-law] John Bourchier 1st Baron Berners (age 25) and Margery Berners Baroness Berners (age 32) were married. He the son of William Bourchier 1st Count Eu and Anne of Gloucester Plantagenet Countess Eu and Stafford. He a great grandson of King Edward III of England.

Before 25 Oct 1445 [her brother-in-law] William Bourchier Baron Fitzwarin (age 30) and Thomasine Hankford 9th Baroness Fitzwarin (age 22) were married. He by marriage Baron Fitzwarin. He the son of William Bourchier 1st Count Eu and Anne of Gloucester Plantagenet Countess Eu and Stafford. He a great grandson of King Edward III of England.

Before 02 Feb 1461 [her son-in-law] John Courtenay 15th Earl Devon (age 26) and [her daughter] Laura Bourchier Countess Devon (age 21) were married. She the daughter of Henry Bourchier 2nd Count Eu 1st Earl Essex (age 57) and Isabel York Countess Eu and Essex (age 52). He the son of Thomas Courtenay 13th Earl Devon and Margaret Beaufort Countess Devon. They were third cousins. He a great x 2 grandson of King Edward III of England. She a great x 2 granddaughter of King Edward III of England.

In or before 1462 [her son] Henry Bourchier and [her daughter-in-law] Elizabeth Scales Countess Rivers were married. He the son of Henry Bourchier 2nd Count Eu 1st Earl Essex (age 57) and Isabel York Countess Eu and Essex (age 52). He a great x 2 grandson of King Edward III of England. She a great x 5 granddaughter of King Edward "Longshanks" I of England.

Before 02 May 1462 [her son] John Bourchier 6th Baron Ferrers of Groby (age 24) and [her daughter-in-law] Elizabeth Ferrers 6th Baroness Ferrers Groby (age 43) were married. He by marriage Baron Ferrers of Groby. He the son of Henry Bourchier 2nd Count Eu 1st Earl Essex (age 58) and Isabel York Countess Eu and Essex (age 53). They were third cousin once removed. He a great x 2 grandson of King Edward III of England. She a great x 4 granddaughter of King Edward "Longshanks" I of England.

On or before 15 Aug 1467 [her son] William Bourchier Viscount Bourchier (age 37) and [her daughter-in-law] Anne Woodville Viscountess Bourchier (age 29) were married. An example of a Woodville marriage to a wealthy family which antagonised the nobilty - see Woodville Marriages. William Bourchier Viscount Bourchier (age 37) was heir to his father [her husband] Henry Bourchier 2nd Count Eu 1st Earl Essex (age 63). She the daughter of Richard Woodville 1st Earl Rivers (age 62) and Jacquetta of Luxemburg Duchess Bedford (age 52). He the son of Henry Bourchier 2nd Count Eu 1st Earl Essex (age 63) and Isabel York Countess Eu and Essex (age 58). He a great x 2 grandson of King Edward III of England.

In or before 1474 [her brother-in-law] William Bourchier Baron Fitzwarin (age 58) and Catherine Affeton were married. He the son of William Bourchier 1st Count Eu and Anne of Gloucester Plantagenet Countess Eu and Stafford. He a great grandson of King Edward III of England.

[her son] Humphrey Bourchier and Joan Stanhope were married. He the son of Henry Bourchier 2nd Count Eu 1st Earl Essex and Isabel York Countess Eu and Essex. He a great x 2 grandson of King Edward III of England.

[her son] Thomas Bourchier and Isabella Barre were married. He the son of Henry Bourchier 2nd Count Eu 1st Earl Essex and Isabel York Countess Eu and Essex. He a great x 2 grandson of King Edward III of England.