John Oldcastle alive. His heretical opinions and early friendship with Henry V created a traditional scandal which long continued. In the old play "The Famous Victories of Henry V", written before 1588, Oldcastle figures as the Prince's boon companion. When Shakespeare adapted that play in "Henry IV, Part 1", Oldcastle still appeared, but when the play was printed in 1598, the name was changed to Falstaff (modelled after John Fastolf), in deference to one of Oldcastle's descendants, Lord Cobham. Though the fat knight still remains "my old lad of the Castle", the stage character has nothing to do with the Lollard leader.
Sir John Oldcastle play, which has not survived; because of this fact, the extant play has sometimes been called "Sir John Oldcastle, Part I" or "1 Sir John Oldcastle.") In 1664, the play was one of the seven dramas added to the second impression of the Shakespeare Third Folio by publisher Philip Chetwinde. Like other subjects of Elizabethan history plays, Sir John Oldcastle was an actual person, a soldier and Lollard dissenter who was hanged and burned for heresy and treason in 1417 — thus earning himself a place in the seminal text of the Protestant Reformation in Tudor England, John Foxe's "Book