Richard Wesley, 1st Baron Mornington
Richard Colley Wesley, 1st Baron Mornington (– 31 January 1758) was an Irish peer, best remembered as the grandfather of Arthur Wellesley, 1st Duke of Wellington.
John of Lancaster, 1st Duke of Bedford
John of Lancaster, 1st Duke of Bedford KG (20 June 138914 September 1435) was a medieval English prince, general and statesman who commanded England's armies in France during a critical phase of the Hundred Years' War.
Bedford was the third son of King Henry IV of England, brother to Henry V, and acted as regent of France for his nephew Henry VI.
Despite his military and administrative talent, the situation in France had severely deteriorated by the time of his death.
Bedford was a capable administrator and soldier, and his effective management of the war brought the English to the height of their power in France.
However, difficulties mounted after the arrival of Joan of Arc, and his efforts were further thwarted by political divisions at home and the waverings of England's key ally, the duchy of Burgundy.
In the last years of Bedford's life, the conflict devolved into a war of attrition, and he became increasingly unable to gather the necessary funds to prosecute the conflict.
Bedford died during the congress of Arras in 1435, just as Burgundy was preparing to abandon the English cause and conclude a separate peace with Charles VII of France.
John Popham (military commander)
Sir John Popham( c. 1395 – c. 1463) was MP for Hampshire and Sheriff of Hampshire.
He was a military commander and speaker- elect of the House of Commons.
He took part in Henry V's invasion of France in 1415 and in the French wars under John of Lancaster, 1st Duke of Bedford.
He was elected Speaker of the House of Commons in 1449 but was permitted by King Henry VI to decline the office on the ground of infirmity.
Elizabeth of Lancaster, Duchess of Exeter
Elizabeth of Lancaster( bf. 21 February
1363 – 24 November 1426) was the third child of John of Gaunt, 1st Duke of Lancaster, and his first wife Blanche of Lancaster.
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.
Henry IV of England
Henry IV (15 April 1367 – 20 March 1413), also known as Henry Bolingbroke , was King of England from 1399 to 1413.
He asserted the claim of his grandfather King Edward III, a maternal grandson of Philip IV of France, to the Kingdom of France.
Henry was the son of John of Gaunt (the fourth son of Edward III) and Blanche of Lancaster.
John enjoyed a position of considerable influence during much of the reign of his nephew King Richard II, whom Henry eventually deposed.
Henry founded the Lancaster branch of the House of Plantagenet.
He was the first King of England since the Norman Conquest whose mother tongue was English rather than French.
Antigone of Gloucester, Countess of Tankerville
Antigone of Gloucester was an English noblewoman and the illegitimate daughter of Humphrey of Lancaster, 1st Duke of Gloucester( 1390 – 1447).
She was the granddaughter of King Henry IV.
She is thought to have been born between 1425 and 1428.
Her date of death is not known, but it was later than 1450.
Blanche of Lancaster
Blanche of Lancaster (25 March 1342 – 12 September 1368) was a member of the English royal House of Plantagenet and the daughter of the kingdom's wealthiest and most powerful peer, Henry of Grosmont, 1st Duke of Lancaster.
She was the first wife of John of Gaunt, the mother of King Henry IV, and the grandmother of King Henry V of England.
James FitzJames, 1st Duke of Berwick
James FitzJames, 1st Duke of Berwick, 1st Duke of Liria and Jérica, 1st Duke of Fitz- James( 21 August 1670 – 12 June 1734) was an Anglo- French military leader, illegitimate son of King James II of England by Arabella Churchill, sister of the 1st Duke of Marlborough.
Berwick was a successful general in the pay of Louis XIV of France.
John Rickingale
John Rickingale also known as John de Rickingale( died 1429) was a medieval Bishop of Chichester, Master of Gonville Hall, Cambridge, Chancellor of the University of Cambridge and Chancellor of York Minster.
Rickingale was the last rector of Hemingbrough rectory before Prior John Wessington converted it into a collegiate church.
This happened when Rickingale was nominated as bishop of Chichester on 27 February 1426.
The nomination was through the interest of John of Lancaster, 1st Duke of Bedford, to whom he was confessor.
He was consecrated in Mortlake parish church on 30 or 3 June 1426.
He was an early humanist.

Question: Who is the paternal grandfather of John Of Lancaster, 1St Duke Of Bedford?
Answer: John of Gaunt