I misread a student’s handwriting and thought they had written “Prester Joan” (instead of “Prester John”). Now I can’t stop thinking of Prester Joan teaming up with Pope Joan to, I don’t know, conquer the moon or something.
[edited to add]
Ariosto calls Prester John Senapo, from senape “the mustard plant”. So this character in Orlando Furioso comes with his own soundtrack, although I expect most of my students are too young to hear it.