Actually I would prefer Mr. Knight.
I mean, didn't Lancelot steal some guy's queen away like some smooth-talking alpha male who cares more about looking cool and getting what he wants than other people's feelings? I'd rather not be known as that kind of guy (half-serious half-joking).
But as to testing whether William will end up meaning you harm as an obsessive, possibly violent stalker or genuine fan of yours, I think I'll hold off roughing him up with my martial arts prowess until he exhibits behavior worthy of the "aggressive screening" that I as your personal guard am obligated to put your potential suitors through.