Anne Neville, Duchess of Buckingham
Anne Neville( d.1480) was a daughter of Ralph Neville, 1st Earl of Westmorland, and his second wife Lady Joan Beaufort.
Her first husband was Humphrey Stafford, 1st Duke of Buckingham, and she was an important English noblewoman, landholder and book owner during the fifteenth century.
Eleanor Neville, Countess of Northumberland
Lady Eleanor Neville( c. 1397–1472) was the second daughter of Ralph de Neville, 1st Earl of Westmorland( died 1425), by his second wife, Joan Beaufort, daughter of John of Gaunt, 1st Duke of Lancaster and Katherine Swynford.
Obata Toramori
He was the father of Obata Masamori.
Ralph Neville, 3rd Earl of Westmorland
Ralph Neville, 3rd Earl of Westmorland( c. 1456 – 6 February 1499) was an English peer.
He was the grandfather of Ralph Neville, 4th Earl of Westmorland.
Annabella of Scotland
Annabella Stewart( – 1509) was the youngest daughter of King James I and Joan Beaufort.
Joan Beaufort, Countess of Westmorland
Joan Beaufort (– 13 November 1440), was the youngest of the four legitimised children and only daughter of John of Gaunt, 1st Duke of Lancaster (third surviving son of King Edward III), by his mistress, later wife, Katherine Swynford.
She married Ralph de Neville, 1st Earl of Westmorland and in her widowhood became a powerful landowner in the North of England.
John of Gaunt
John of Gaunt, Duke of Lancaster (6 March 1340 – 3 February 1399) was an English prince, military leader, and statesman.
He was the third of the five sons of King Edward III of England who survived to adulthood.
Due to his royal origin, advantageous marriages, and some generous land grants, Gaunt was one of the richest men of his era, and an influential figure during the reigns of both his father, Edward, and his nephew, Richard II.
As Duke of Lancaster, he is the founder of the royal House of Lancaster, whose members would ascend to the throne after his death.
His birthplace, Ghent, corrupted into English as "Gaunt", was the origin for his name.
When he became unpopular later in life, scurrilous rumours and lampoons circulated that he was actually the son of a Ghent butcher, perhaps because Edward III was not present at the birth.
This story always drove him to fury.
John's early career was spent in France and Spain fighting in the Hundred Years' War.
He made an abortive attempt to enforce a claim to the Crown of Castile that came through his second wife, and for a time styled himself as King of Castile.
As Edward the Black Prince, Gaunt's elder brother and heir to the ageing Edward III, became incapacitated due to poor health, Gaunt assumed control of many government functions, and rose to become one of the most powerful political figures in England.
He was faced with military difficulties abroad and political divisions at home, and disagreements as to how to deal with these crises led to tensions between Gaunt, the English Parliament, and the ruling class, making him an extremely unpopular figure for a time.
John exercised great influence over the English throne during the minority of King Richard II, and the ensuing periods of political strife.
He mediated between the king and a group of rebellious nobles, which included Gaunt's own son and heir, Henry Bolingbroke.
Following Gaunt's death in 1399, his estates and titles were declared forfeit to the Crown, and his son, now disinherited, was branded a traitor and exiled.
Henry Bolingbroke returned from exile shortly after to reclaim his inheritance, and deposed Richard.
He reigned as King Henry IV of England (1399–1413), the first of the descendants of John of Gaunt to hold the English throne.
The House of Lancaster would rule England from 1399 until the time of the Wars of the Roses, when the English crown was disputed with the House of York (formed by the descendants both of his younger brother Edmund, Duke of York and his elder brother, Lionel, Duke of Clarence).
Gaunt also fathered five children outside marriage: one early in life by a lady-in-waiting to his mother, the others by Katherine Swynford, his long-term mistress and third wife.
They were later legitimised by royal and papal decrees, but which did not affect Henry IV's bar to their having a place in the line of succession.
Gaunt is ancestor to the English monarchs of the houses of Lancaster by his first wife and Tudor by his mistress and later third wife, whose children bore the surname "Beaufort".
Ralph Neville, 4th Earl of Westmorland
Ralph Neville, 4th Earl of Westmorland,( 21 February 1498 – 24 April 1549) was an English peer and soldier.
He was the grandson of Ralph Neville, 3rd Earl of Westmorland, and the father of Henry Neville, 5th Earl of Westmorland.
Henry Stafford (died 1471)
Sir Henry Stafford( c. 1425 – 4 October 1471) was the second son of Humphrey Stafford, 1st Duke of Buckingham and Lady Anne Neville, daughter of Ralph de Neville, 1st Earl of Westmorland, and Lady Joan Beaufort.
Henry's elder brother, also named Humphrey, died before their father, and so it was Henry's nephew, also Henry, who became the 2nd Duke of Buckingham.
Stafford was the third husband of Margaret Beaufort, Countess of Richmond and Derby.
The marriage was relatively long and successful and coincided roughly with the minority of Margaret's son, the future Henry VII of England.
Both Sir Henry and Lady Margaret were descended from John of Gaunt and were supporters of Henry VI, the head of the House of Lancaster, in the early stages of the Wars of the Roses.
However, Stafford later switched his allegiance to the House of York and towards the end of his life contributed to the restoration of Edward IV.
Elizabeth Beauchamp, Baroness Bergavenny
Elizabeth Beauchamp, Baroness( A) Bergavenny( 16 September 1415 – 18 June 1448) was a medieval English noblewoman and heiress.
She was the only child of Richard de Beauchamp, Baron Abergavenny and Earl of Worcester, by Isabel, daughter of Thomas le Despenser, Earl of Gloucester by Constance of York, granddaughter of Edward III.
She inherited her father's estates upon his death in 1422, and succeeded to the title of Lady Bergavenny[ E., 1392] on 18 March 1422," suo jure".
She became the first wife of Edward Neville, 3rd Baron Bergavenny( d. 1476) before 18 October 1424.
He was a younger son of Ralph de Neville, 1st Earl of Westmorland and Joan Beaufort, Countess of Westmorland, daughter of John of Gaunt and his third wife, Katherine Roët, aka Katherine Swynford.
Elizabeth and Edward had several children including George Nevill, 4th Baron Bergavenny.
She was buried in Coventry in the graveyard of the Carmelites.

Question: What is the place of birth of Joan Beaufort, Countess Of Westmorland's father?
Answer: Ghent