I think it ' s pretty clear from the interactions with Chauncey that the original idea was that , once given , parts of a name could be traded by different entities . So if he gave half to one demon and the other half to another , they could both gives those parts to a third party who would then be able to use it , despite having gotten none of the name from person themselves . That being said , it ' s hard to use the first couple books to establish anything in the Magic system as concrete seeing as it changed around a bit at the start there . <| sep |> I know . I hate holiday spirit . I never have it . What ' s the saying , fake it until you make it . That ' s my strategy this year . So far so good . Hope it works for you .