considering whichever religion was prevalent, likely Demons and such or their local equivalent (goblins, elves, pixies, etc) Ghosts, birds, animals, spies, authority figures with presumed magical powers. I mean the list is as broad as the abnormal imagination it inhabits, so it'd be hard to give historical cites. After all, any diagnosis prior to the advent of psychiatric medicine would be tenuous at best and likely religiously influenced (He's got a demon! He's under a witch's cures! He's gone mad!"). Remember, spiritualism was the de facto mental services system for much of history, so both the diagnoses and the cures would likely run via that vein.