the illegitimate son of King Edward IV & possibly Elizabeth Lucy. (This is all well documented, though how you can be certain of who his father is not be certain of his mother is beyond my understanding. )

Notes for John (Sir) BASSET:
John Basset, junior died in 1485 and his son John, married firstly Ann Denys, (DENNIS)daughter of John Denys and secondly Honor Grenville, daughter of Thomas Grenville By Ann he had five children, their only boy died as a child and the four daughters were called Jane, Marjorie, Anne and Thomasine. As Sheriff of Cornwall in 1497 Sir John was a target for the Flamoke Rebellion, the Cornish uprising lead by a group of rebels under Richard Pendyn of Pendeen, whose main grievance was heavy taxation, and who attacked and 'dismantled' Tehidy, the family home. John Basset was created Knight of the Bath by King Henry V11 in November, 1501 at the time of the marriage of Katherine of Aragon to the Heir Apparent, Prince Arthur. At the same ceremony was his best friend Sir Thomas Grenville and Sir John Arundel, Sir Thomas Grenville's son- in-law, being married to his daughter Jane. By 1515 Sir Thomas Grenville was dead and Sir John Basset, a widower. Sir John was sheriff of Cornwall in 1517 and 1522 and was the first Basset to hold, in 1524 the office of Sheriff of Devon. He was Commissioner of the Peace for Devon from 1510-1515 and 1517, 1519, 1522 and 1524 and for Cornwall in 1520, 1521 and 1522. In 1523/4 Sir John was one of the commissioners responsible for collecting the Subsidy in Cornwall & Devon and in 1525 attended the grand funeral of Catherine, Countess of Devon who was the daughter of Edward 1V. He was well apointed with the Court in a high administrative position. During these years Honor bore him three sons and four daughters. Phillipa was born in 1516, John on the 6th October, 1518, Katherine about 1519, Anne c 1521, George c 1522/3, Mary c 1525 and James the youngest in 1526/7. With her four step-daughters this made a family of eleven children to be fed, clothed, educated, placed in worthy positions of employment and married to financially and socially eligible partners. Honor was well up to the task. Sir John Basset died on the 31st January, 1529 and his tomb chest, is in the nave of St Mary's church, Atherington. The monumental brass depicts him and his two wives and all their children.
BASSET OF UMBERLEIGH, DEVON
Sir John Basset of Umberleigh, son of Sir John Basset and Joan Beaumont, died January 31, 1528 (Inq. 20 Henry Eight 20). He married:-A. Anne, daughter of John Dennis of Oxleigh and Eleanor Giffard; widow of Patrick Bellewe of Aldervescot; buried with husband in Atherington Church, Devon.B. Honor, daughter of Sir Thomas Grenville of Stow and Isabel Gilbert; born about 1498, married about 1515, died probably about 1548. Buried in Atherington Church. [The burial register of this church previous to 1570 has perished.] She married, secondly, Arthur Plantagenet, Viscount Lisle, son of Edward the Fourth and Elizabeth Lucy.
Issue of Sir John Basset
(A) by Anne Dennis:-
1. A son, whose only memorial is on the sepulchral brass of his parents at Atherington probably died young. 2. Anne, married Sir James Courtenay of Powderham. (Issue,-James, and John.)
3. Margery, (Harl. Ms. 1149, folio 13, b.) married Edward Marrays of Marrays, Cornwall. (Issue,-Margaret, married George Rolle, Lady Lisle's solicitor.) 4. Jane, born about 1505; apparently died unmarried.
5. Thomasine, born about 1512, died unmarried, March 19, 1535-(Lisle Papers, Three 1.)
(B) By Honor Grenville:-
6. Philippa, born about 1516; probably died unmarried.
7. Katherine, born about 1518; married, after 1542, Sir Henry Ashley of Ashley and Wimborne Saint Giles (Shaftesbury family); date of death not known. (Issue,-Henry, and Edward, who probably died young.-Harl. Ms. 888, folio 40, b.)
8. John, born October 26, 1519 (Inq. 20 Henry Eight 20); died Apr. 3, 1545 (Inq. 2 Philip and Mary, 10). Married Frances, eldest daughter of Arthur Plantagenet, Viscount Lisle, by his first wife Elizabeth Grey; married at Calais, February 17 to 22, 1538 (Lisle Papers, Eleven 40, 41); died about 1560. She married, secondly, Thomas Monke of Potheridge, county Devon.
9. Anne, born about 1520; Maid of Honour from 1537 (Lisle Papers, Eleven 110) to 1554 (Tallies Roll, 2-3 Philip and Mary); married, probably between July 7 and October 27, 1555, Sir Walter Hungerford of Farleigh Castle, son of the last Lord Hungerford of Heytesbury; died childless, probably in 1558-9. (Hungerford family papers).
10. George, born about 1522, died in London, 1579. (Harl. Mss., 757, folio 214; 760, folio 322.) Married Jaquit, daughter and heir of John Coffyn of Portledge, county Devon. She married, secondly, Henry Jones.
11. Mary, born about 1525, married at Atherington, June 9, 1557 (Register), John Wollacombe of Combe, county Devon. (Issue,-John, Thomas, and Honor.-Harl. Ms. 3288, folio 49.)
12. James, born 1527 (Foxe's Acts and Monuments, Pratt's Townsend's ed., Six 231), proctor of Bishop Gardiner, 1543 to 1555; Gentleman of Chamber to Queen Mary, about 1556-8; died November 1558; buried Black Friars' Church, London. ("Machyn's Diary," page 179.) Married Mary, daughter of William Roper and Margaret his wife, daughter of Sir Thomas More.
Issue of John Basset and Frances Plantagenet:-
1. Honor, born at Calais, about May 10, 1539 (Lisle Papers, One 72; Eleven 97; Twelve 85), probably died young.
2. Sir Arthur, born 1540 (Inq. 1 March-2 Philip and Mary, 10), probably at Calais; died of gaol fever, caught at the Black Assize, Exeter (Stow's "Chronicle," page 719), April 2, 1586 (Epitaph); buried at Atherington, April 7 (Register). Married Eleanor, daughter of John Chichester of Raleigh, county Devon, and Gertrude Courtenay of Powderham; buried at Atherington, July 8, 1585 (Register).
Issue of Sir Arthur Basset and Eleanor Chichester:-
1. Sir Robert, born 1574 (Matriculation Books, Queen's College, Oxford); living 1620 (Anderson's. "Royal Genealogies," page 745). Claimed the Crown on death of Queen Elizabeth, as legal descendant of Edward the Fourth. He married Elizabeth, daughter and coheir of Sir William Periam, Judge of the King's Bench; married November 21, 1591 (Register of Saint Dunstan in the West, London); died 1633.
2. Anne, married after 1585 Sir John Chichester of Hall, county Devon; died 1665; buried at Marwood. (Left issue.)
3. Margaret, under ten years old in 1585 (Will of Sir A. Basset).
4. Arthur, under fourteen years old in 1585 (Will of Sir A. Basset).
5. William, born 1583 (Matriculation Books, University College, Oxford).
6. Francis, baptised at Atherington, May 8, 1584 (Register).
7. John, baptised at Atherington June 1, 1585 (Register).
Issue of Sir Robert Basset and Elizabeth Periam:-
1. Arthur, baptised June 6, 1593 (Register of Saint Dunstan in the West, London); buried February 3, 1595 (Register of Saint Bartholemew the Less, London).
2. Anne, baptised October 16, 1594 (Register of Saint Bartholemew the Less, London); married Jonathan Rashley of Fox (Harl. Mss. 1091, folio 122; 1538, folio 280).
3. Ellen, married George Yeo of Hushe (Harl. Mss. 1091, folio 122; 1538, folio 280).
4. Arthur, born at Heanton (Prince's "Worthies of Devon," page 113), 1598 (ibidem, Harl. Ms. 1080, folio 343, b.); Colonel in King Charles's army; died January 7, 1672; buried at Heanton (Prince, page 116). Married Anne, daughter of William Leigh of Burrow, county Devon.
5. Eleanor (Harl. Ms. 1091, folio 122).
6. Mary (Harl. Ms. 1091, folio 122).
7. William, born March 28, 1602-3 (Harl. Ms. 1080, folio 343, b.; Matriculation Books, Exeter College, Oxford).
1. John, of Heanton, living [?] 1673. (Son of Arthur & Anne Leigh) Married Susannah, daughter of (unknown).