Question: Who was the mother of Margaret Tudor and daughter of Edward IV?

full_context: Document 1: Elizabeth of Bosnia: Elizabeth of Bosnia (  1339  – January 1387) was queen consort and later regent of Hungary and Croatia, as well as queen consort of Poland. Daughter of Ban Stephen II of Bosnia, Elizabeth married King Louis I of Hungary in 1353. In 1370, she gave birth to a long-anticipated heir, Catherine, and became Queen of Poland when Louis succeeded his uncle, Casimir III. The royal couple had two more daughters, Mary and Hedwig, but Catherine died in 1378. Initially a powerless consort with no substantial influence, Elizabeth then started surrounding herself with noblemen loyal to her, led by her favourite, Nicholas I Garai. When Louis died in 1382, Mary ascended to the throne of Hungary with Elizabeth as regent. Unable to preserve the personal union of Hungary and Poland, the queen dowager secured the Polish throne for her youngest daughter, Hedwig.
Document 2: Arthur, Prince of Wales: Arthur Tudor (20 September 1486 – 2 April 1502) was Prince of Wales, Earl of Chester and Duke of Cornwall. As the eldest son and heir apparent of Henry VII of England, Arthur was viewed by contemporaries as the great hope of the newly established House of Tudor. His mother, Elizabeth of York, was the daughter of Edward IV, and his birth cemented the union between the House of Tudor and the House of York.
Document 3: Margaret Howard, Countess of Nottingham: Margaret Stuart (or Stewart) (c. 1591 – 4 August 1639), was an English court office holder. She served as lady-in-waiting to the queen consort of England, Anne of Denmark. She was the daughter of James Stewart, 2nd Earl of Moray, and Elizabeth Stuart, 2nd Countess of Moray.
Document 4: Henry Stewart, 1st Lord Methven: Henry Stewart, 1st Lord Methven (c. 1495 – 1552) was Master of the Scottish Artillery and last husband of Margaret Tudor, eldest daughter of Henry VII of England and Elizabeth of York.
Document 5: Hugh Conway (Lord Treasurer): Sir Hugh Conway was created Lord Treasurer of Ireland in 1494 by King Henry VII of England. He replaced Sir James Ormonde as Lord Treasurer of Ireland. In 1504 he was appointed Treasurer of Calais by Henry VII ( Cal. Pat. Rolls Henry VIII, vol. ii, 365). Hugh Conway was an early supporter of Henry Tudor, Earl of Richmond (later Henry VII), was sent by Margaret Beaufort, Henry's mother to Henry, in exile in France, in 1483 with a large sum of money and encouragement to invade England through Wales and seize the crown from Richard III. Henry did so in 1485 and Richard was killed at the Battle of Bosworth, where Hugh was present. Hugh was appointed Keeper of the Great Wardrobe by King Henry VII on 21 September 1485, was knighted in January 1486 at the coronation of Queen Elizabeth of York, daughter of King Edward IV, and married Elizabeth Courtenay, daughter of Sir Thomas Courtenay, Earl of Devon, in 1490. Sir Hugh Conway was appointed Sheriff of Buckinghamshire and Bedfordshire by Henry VII in 1500. Sir Hugh was a son of John ‘ Aer Conwy Hen ’ of Bodrhyddan Hall and Constable of Rhuddlan Castle, Flintshire, Wales, by his first marriage, and descended from the ancient line of Conway (Conwy = Wales) and de Crevecouer (The Journal Of The Flintshire Historical Society (Appendix D: Conwy Pedigree (British Museum Harleian MS 1971))). Sir Hugh's younger half-brother was Edward Conway who married the heiress of Arrow and Alcester, Warwickshire, and was great-grandfather to Edward Conway, 1st Viscount Conway of Ragley Hall, ancestor of the present family of Seymour Conways, Marquis of Hertford.
Document 6: Elizabeth of York: Elizabeth of York (11 February 1466 – 11 February 1503) was queen consort of England from 1486 until her death. As the wife of Henry VII, she was the first Tudor queen. She was the daughter of Edward IV and niece of Richard III, and she married the king following Henry's victory at the Battle of Bosworth which started the last phase of the Wars of the Roses. She was the mother of King Henry VIII. Therefore, she was the daughter, sister, niece, wife, mother, and grandmother of successive kings and queens of England.
Document 7: Treaty of Medina del Campo (1489): The Treaty of Medina del Campo was an agreement developed on March 26, 1489 between England and the nascent Spain. Its provisions accomplished three goals: the establishment of a common policy for the two countries regarding France, the reduction of tariffs between the two countries, and, most centrally, the arrangement of a marriage contract between Arthur Tudor, eldest son of Henry VII of England, and Catherine of Aragon, daughter of Isabella I of Castile and Ferdinand II of Aragon. The treaty was signed on March 27 by Spanish sovereigns, but its ratification by Henry did not occur until September 1490 by the Treaty of Woking.
Document 8: Elizabeth Woodville: Elizabeth Woodville (also spelled Wydville, Wydeville, or Widvile; c. 1437 – 8 June 1492) was Queen consort of England as the spouse of King Edward IV from 1464 until his death in 1483. At the time of her birth, her family was mid-ranked in the English aristocracy. Her first marriage was to a minor supporter of the House of Lancaster, Sir John Grey of Groby; he died at the Second Battle of St Albans, leaving Elizabeth a widowed mother of two sons. Her second marriage, to Edward IV, was a cause célèbre of the day, thanks to Elizabeth's great beauty and lack of great estates. Edward was only the second king of England since the Norman Conquest to have married one of his subjects, and Elizabeth was the first such consort to be crowned queen. Her marriage greatly enriched her siblings and children, but their advancement incurred the hostility of Richard Neville, Earl of Warwick, 'The Kingmaker', and his various alliances with the most senior figures in the increasingly divided royal family.
Document 9: Margaret Tudor: Margaret Tudor (28 November 1489 – 18 October 1541) was Queen of Scots from 1503 until 1513 by marriage to James IV of Scotland and then, after her husband died fighting the English, she became regent for their son James V of Scotland. She was born at Westminster Palace as the oldest daughter of Henry VII of England and Elizabeth of York, and granddaughter of Margaret Beaufort, Edward IV of England and Queen Elizabeth Woodville. Margaret Tudor had several pregnancies, but most of her children died young or were stillborn. As queen dowager she married Archibald Douglas, 6th Earl of Angus. Through her first and second marriages, respectively, Margaret was the grandmother of both Mary, Queen of Scots, and Mary's second husband, Lord Darnley. Margaret's marriage to James IV foreshadowed the Union of the Crowns – their great-grandson, James VI and I, was the first to be monarch of both Scotland and England.
Document 10: Sir Edward Burgh: Sir Edward Burgh (pronounced as Borough) (d. before April 1533) was the eldest son and heir to Sir Thomas Burgh, 1st Baron Burgh and his wife Agnes Tyrwhit. He is known for being the first husband of Catherine Parr, later Queen consort to King Henry VIII. 18th-century historians have mistaken him for his grandfather, the elderly, Sir Edward Burgh, 2nd Baron Burgh of Gainsborough.
Document 11: Elizabeth of Austria (1436–1505): Elizabeth of Austria (German: "Elisabeth" , Polish: "Elżbieta Rakuszanka" ; Lithuanian: "Elžbieta Habsburgaitė" ; c. 1436 – 30 August 1505) was the wife of King Casimir IV of Poland and thus Queen of Poland and Grand Duchess of Lithuania. Orphaned at an early age, she spent her childhood in the court of Holy Roman Emperor Frederick III. As one of the three surviving grandchildren of Emperor Sigismund, she had a strong claim to the kingdoms of Hungary and Bohemia. That made her an attractive bride for a Polish prince. The Polish nobility, seeking to increase Polish influence in Hungary and Bohemia, pursued marriage with Elizabeth since she was born and finally succeeded in 1454. Her marriage to Casimir was one of the most exemplary royal marriages in Poland. She gave birth to thirteen children, eleven of whom survived to adulthood. Four of her sons were crowned as kings.
Document 12: Henry FitzRoy, 1st Duke of Richmond and Somerset: Henry FitzRoy, 1st Duke of Richmond and Somerset (15 June 1519 – 23 July 1536), was the son of King Henry VIII of England and his mistress, Elizabeth Blount, and the only illegitimate offspring whom Henry VIII acknowledged. He was the younger half-brother of Queen Mary I, as well as the older half-brother of Queen Elizabeth I and King Edward VI. Through his mother he was the elder half-brother of the 4th Baroness Tailboys of Kyme and of the 2nd and 3rd Baron Tailboys of Kyme.
Document 13: Richard Woodville, 1st Earl Rivers: Richard Woodville (or Wydeville), 1st Earl Rivers (1405 – 12 August 1469) was an English nobleman, best remembered as the father of Queen consort Elizabeth Woodville and the maternal grandfather of Edward V and the maternal great-grandfather of Henry VIII.
Document 14: Catherine of York: Catherine or Katherine of York (14 August 1479 – 15 November 1527) was the ninth child and sixth daughter of King Edward IV by his wife Elizabeth Woodville. From birth to death, she was daughter to Edward IV, sister to Edward V, niece to Richard III, sister-in-law to Henry VII and aunt to Henry VIII.
Document 15: Elizabeth Cheney (1422–1473): Elizabeth Cheney (April 1422 – 25 September 1473) was a member of the English gentry, who, by dint of her two marriages, was the great-grandmother of Anne Boleyn, Jane Seymour, and Catherine Howard, three of the wives of King Henry VIII of England, thus making her great-great-grandmother to King Edward VI, the son of Henry VIII and Jane Seymour, and Elizabeth I, the daughter of Henry VIII and Anne Boleyn. Her first husband was Sir Frederick Tilney, and her second husband was Sir John Say, Speaker of the House of Commons. She produced a total of eight children from both marriages.
ground_truth: Elizabeth of York