Edward of Westminster (13 October 1453 – 4 May 1471), also known as Edward of Lancaster, was the only son of King Henry VI of England and Margaret of Anjou. He was killed at the Battle of Tewkesbury, making him the only heir apparent to the English throne to die in battle....LESS
Edward was not the only one to be accused of illegitimacy in the 15th century: Charles VII of France, Edward of Westminster (son of Henry VI of England), and Joanna "La Beltraneja" of Castile also had this accusation slung at them by enemies seeking to disinherit them. from Edward IV of England
A Lancastrian heir, Edward of Westminster, Prince of Wales, was killed on the battlefield. from Edward IV of England
Edward's father Richard, Duke of York, had been heir to King Henry VI until the birth of Henry's son Edward in 1453. from Edward IV of England
Edward IV (28 April 1442 – 9 April 1483) was the King of England from 4 March 1461 to 3 October 1470, and again from 11 April 1471 until his death in 1483. He was the first Yorkist King of England. The first half of his rule was marred by the violence associated with the Wars of the Roses, but he overcame the Lancastrian challenge to the throne at Tewkesbury in 1471 to reign in peace until his sudden death. Before becoming king, he was 4th Duke of York, 7th Earl of March, 5th Earl of Cambridge and 9th Earl of Ulster. He was also the 65th Knight of the Order of the Golden Fleece.