The Merry Wives of Windsor in 1597, after which controversy over the original naming of Falstaff (he was originally the historic Sir John Oldcastle, which presumably did not please Oldcastle's descendants) forced Shakespeare to rename the character. It appears that the joke in V,v,85–90 is that Oldcastle/Falstaff incriminates himself by calling out the first letter of his name, "O, O, O!," when his fingertips are singed with candles—which of course works for "Oldcastle" but not "Falstaff." There is also the "castle" reference in IV,v,6. 18 January 1602 was the date the play was entered into the Register of the Stationers Company. The first quarto was
John Shakespeare the lord of the manor on behalf of the corporation. In 1569 John had applied for a coat of arms, the application – subsequently withdrawn – including a vague claim of an ancestor having been honoured by King Henry VII, a draft of which application (with parenthetical additions representing amendments to be made in a successive draft) reading: '... John Shakespeare... whose parentes and late antecessors [grandfather] were for there [his] valeant and faithefull service advaunced and rewarded by the most prudent prince king Henry the Seventh of famous memorie, sythence whiche tyme they have continewed... in good reputation and