Did you notice the ?? at the end of my #1281? Apparently Jesi, Jesuses, and even Jesii are all acceptable, depending on where you are. I prefer the Jesi form when I'm at home, where we normally converse in Latin. It's classier than "vernacular". Obviously.
Well I don't speak great Latin sadly. I'm not sure why anybody would choose to speak Latin over English these days. Although I would like to see Tickles have a go at it.