Crossword clues for the word: OLDCASTLE The word OLDCASTLE has appeared as an answer to at least 2 crossword clues on different crossword puzzles. Crossword clues for OLDCASTLE Showing 1 to 2 of 2 results Clue(s) "English martyr Sir John, the model for Shakespeare's Falstaff" John —, English Lollard leader, a friend of Henry V, who is reputedly the basis for William Shakespeare's character Falstaff