Sir John Oldcastle of Martyrs". Oldcastle was also a minor character in the early Elizabethan history play the "Famous Victories of Henry V" (c. 1586?), which is generally thought to have been one of Shakespeare's sources for his plays on Henry IV and Henry V. The genesis of "Sir John Oldcastle" is crucially linked to the fact that when Shakespeare's "Henry IV" plays premiered on stage in 1597–98, the character Sir John Falstaff was called Sir John Oldcastle. This is indicated by abundant external and internal evidence. The change of names, from "Oldcastle" to "Falstaff," is mentioned in seventeenth-century works by Richard James
John Fastolf family. The bulk of Sir John's fortune passed to Magdalen College, Oxford, where he is remembered as a benefactor, and where there is a Fastolf Society. Fastolf appears in Shakespeare's early play Henry VI, part 1 as a cowardly knight who abandons the heroic Lord Talbot. In the first two folios the name of the character is given as 'Falstaffe' not Fastolf. When Shakespeare came to write Henry IV, part 1, set in the early years of Fastolf's career, he created a disreputable boon companion for the young Prince Hal called Sir John Oldcastle. The descendants of the real Oldcastle