i dont remember names, but
the first orb is in a hole in the wall in the house of fear
the orb of zander is in wittaland, im pretty sure its the monastery, you need to trade him two other orbs for his
the orb for thief bay is part of a quest you get in ezalbelaz, get it in the castle, find the orb in the cave between half moon and recife
one of them is in a locked chest in a town in wittaland
the rob of inferno is in a chest in the last dungeon (but nobody can figure out how to use this one)
there should be one more. but i cant remember where it is... sorry.