Family of Richard Plantagenet - 3rd Earl of Cambridge and Anne Mortimer

Husband: Richard Plantagenet - 3rd Earl of Cambridge (1375-1415)
Wife: Anne Mortimer ( -1411)
Children: Isabel Plantagenet of Cambridge (1409-1484)
Henry Plantagenet ( - )
Richard York - 3rd Duke of York (1411-1460)

Husband: Richard Plantagenet - 3rd Earl of Cambridge

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Richard Plantagenet - 3rd Earl of Cambridge

Name: Richard Plantagenet - 3rd Earl of Cambridge
Sex: Male
Father: -
Mother: -
Note: Richard of Conisburgh, 3rd Earl of Cambridge (c. 20 July 1375 – 5 August 1415) was the second son of Edmund of Langley, 1st Duke of York, and Isabella of Castile. At the age of forty he was beheaded for his part in the Southampton Plot, a conspiracy against King Henry V. He was the father of Richard Plantagenet, 3rd Duke of York, and the grandfather of King Edward IV and King Richard III.
Birth 20 Jul 1375 Conisbrough Castle, Yorkshire1
Death 5 Aug 1415 (age 40)1

Wife: Anne Mortimer

Name: Anne Mortimer1
Sex: Female
Father: -
Mother: -
Death 21 Sep 14111
Burial Kings Langley, Hertfordshire

Child 1: Isabel Plantagenet of Cambridge

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Spouse: Henry Bourchier - 5th Baron Bourchier, 2nd Count of Eu, 1st Viscount Bourchier, 1st Earl of Essex

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Spouse: Henry Bourchier - 5th Baron Bourchier, 2nd Count of Eu, 1st Viscount Bourchier, 1st Earl of Essex

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Spouse: Henry Bourchier - 5th Baron Bourchier, 2nd Count of Eu, 1st Viscount Bourchier, 1st Earl of Essex

Name: Isabel Plantagenet of Cambridge
Sex: Female
Spouse 1: Sir Thomas Grey ( - )
Spouse 2: Henry Bourchier - 5th Baron Bourchier, 2nd Count of Eu, 1st Viscount Bourchier, 1st Earl of Essex (1406-1483)
Children: William Bourchier - Viscount Bourchier ( -1480)
Henry Bourchier (c. 1434-1458)
Thomas Bourchier ( -1492)
John Bourchier - 6th Baron Ferrers of Groby ( -1495)
Humphrey Bourchier - 1st and last Lord Bourchier of Cromwell ( -1471)
Florence Bourchier ( -c. 1525)
Fulke Bourchier ( - )
Hugh Bourchier ( - )
Edward Bourchier ( -1460)
Isabel Bourchier ( - )
Laura Bourchier - Countess of Devon (1440- )
Note: Isabel of Cambridge, Countess of Essex (1409 – 2 October 1484) was the only daughter of Richard, 3rd Earl of Cambridge and Anne Mortimer. She was the sister of Richard Plantagenet, 3rd Duke of York, and like him a great-grandchild of Edward III of England.

Early life
Isabel of York, the only daughter of Richard of Conisburgh, 3rd Earl of Cambridge, and Lady Anne de Mortimer, was born about 1409.[1] On her father's side she was the granddaughter of King Edward III's fourth surviving son, Edmund of Langley, 1st Duke of York, and his first wife, Isabella of Castile. On her mother's side she was the granddaughter of Roger Mortimer, 4th Earl of March (grandson of Lionel of Antwerp) and Lady Alianore Holland (granddaughter of Lady Joan of Kent, Princess of Wales).

Isabel's father, Richard, Earl of Cambridge, was beheaded on 5 August 1415 for his part in the Southampton Plot against King Henry V, and although the Earl's title was forfeited, he was not attainted,[2] and Isabel's brother, Richard, then aged four, was his father's heir.[3] Moreover within a few months of his father's death, Richard's childless uncle, Edward of Norwich, 2nd Duke of York, was slain at the Battle of Agincourt on 25 October 1415, and Isabel's brother was eventually his uncle's heir as well.

Marriages and issue
In 1412, at three years of age, Isabel was betrothed to Sir Thomas Grey (1404 – d. before 1426), son and heir of Sir Thomas Grey (c.1385-1415) of Heaton in Norham, Northumberland, and his wife, Alice Neville, the daughter of Ralph Neville, 1st Earl of Westmorland. They had one son.[4]

She married secondly, before 25 April 1426, the marriage being later validated by papal dispensation, Henry Bourchier, 1st Earl of Essex, by whom she had seven sons and one daughter, Isabel.[5]

William Bourchier, Viscount Bourchier (d. 1480), who married Anne Woodville, daughter of Richard Woodville, 1st Earl Rivers and Jacquetta of Luxembourg, parents of Henry Bourchier, 2nd Earl of Essex and Cecily Bourchier, wife of John Devereux, 8th Baron Ferrers of Chartley;
Sir Henry Bourchier (d. 1462), who married Elizabeth Scales, 8th Baroness Scales.
Humphrey Bourchier, 1st Baron Cromwell (d. 14 April 1471), slain at the Battle of Barnet.
John Bourchier, 6th Baron Ferrers of Groby (d.1495), who married firstly Elizabeth Ferrers, and secondly Elizabeth Chichelle.
Sir Thomas Bourchier (b. prior to 1448 d. 1492), who married Isabella Barre.
Edward Bourchier (d. 30 December 1460), slain at the Battle of Wakefield.
Fulk Bourchier, died young.
Isabel Bourchier, died young.[6]

Death
Henry Bourchier, 1st Earl of Essex, died on 4 April 1483. Isabel remained a widow and died on 2 October 1484.[7] A manuscript calendar records her death on VI Non Oct in 1484. Both were buried at Beeleigh Abbey near Maldon, Essex, but later reburied at Little Easton, Essex.[8]

Footnotes[edit]
1. Richardson IV 2011, pp. 400–404.
2. Cokayne states that he was attainted.
3. Harriss 2004.
4. Burke's Peerage & Baronetage, 106th Edition, Charles Mosley Editor-in-Chief, 1999 Page: 15, 1222
5. Richardson IV 2011, pp. 401–3.
6. Weir states that there were three additional children, Laura Bourchier (b.1440), who married John Courtenay, 7th Earl of Devon; Florence Bourchier (d. 1525); and Hugh Bourchier, died young.
7. Richardson IV 2011, pp. 401–3.
8. Richardson IV 2011, pp. 401–3.
Birth 14092
Title Countess of Essex3
Death 2 Oct 1484 (age 74-75)2
Burial Little Easton Church, Essex, England2

Child 2: Henry Plantagenet

Name: Henry Plantagenet1
Sex: Male

Child 3: Richard York - 3rd Duke of York

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Richard York - 3rd Duke of York

Name: Richard York - 3rd Duke of York
Sex: Male
Spouse: Cecily Neville ( - )
Children: Anne York - Duchess of Exeter ( - )
Edward York - King Edward IV (1442-1483)
Edmund York - Earl of Rutland ( - )
Elizabeth York - Duchess of Suffolk ( - )
Margaret York of York ( - )
George York - 1st Duke of Clarence ( - )
Richard York - King Richard III (1452-1485)
Note: Richard of York, 3rd Duke of York (21 September 1411 – 30 December 1460), was a leading English magnate, a great-grandson of King Edward III through his father and a great-great-great-grandson of that king through his mother. He inherited great estates, and served in various offices of state in France at the end of the Hundred Years' War, and in England, ultimately governing the country as Lord Protector during Henry VI's madness. His conflicts with Henry's wife, Margaret of Anjou, and other members of Henry's court, as well as his competing claim on the throne, were a leading factor in the political upheaval of mid-fifteenth-century England, and a major cause of the Wars of the Roses. Richard eventually attempted to take the throne but was dissuaded, although it was agreed that he would become King on Henry's death (being Lord Protector and Prince of Wales in the meantime). Within a few weeks of securing this agreement, he died in battle.

Although Richard never became king himself, he was the father of Edward IV and Richard III.

Within a few weeks of Richard of York's death, his eldest surviving son was acclaimed King Edward IV, and finally established the House of York on the throne following a decisive victory over the Lancastrians at the Battle of Towton. After an occasionally tumultuous reign, he died in 1483 and was succeeded by his son as Edward V, and York's youngest son succeeded him as Richard III.

Richard of York's grandchildren included Edward V and Elizabeth of York. Elizabeth married Henry VII, founder of the Tudor dynasty, and became the mother of Henry VIII, Margaret Tudor, and Mary Tudor. All subsequent English monarchs have been descendants of Elizabeth of York, and, therefore, of Richard of York.

see https://en.wikipedia.org/wiki/Richard_of_York,_3rd_Duke_of_York
Birth 21 Sep 14114
Death 30 Dec 1460 (age 49) Wakefield, Yorkshire, England4

Sources

1"Wikipedia" (en.wikipedia.org). https://en.wikipedia.org/wiki/Richard_of_Conisburgh,_3rd_Earl_of_Cambridge.
2Ibid. https://en.wikipedia.org/wiki/Isabel_of_Cambridge,_Countess_of_Essex.
3"Tudor Place Website" (http://www.tudorplace.com.ar/BOURCHIER1.htm).
4"Wikipedia" (en.wikipedia.org). https://en.wikipedia.org/wiki/Richard_of_York._3rd_Duke_of_York.