The Trickster's paradoxical nature, combining two opposing aspects, often makes him a threshold deity — a god, if you will, of transitional space. This was true, for example of the archaic Roman god Janus, whose name means 'door'
Kalsched explicitly identifies Janus as the archetypal model for threshold deities, grounding the Trickster's dual, liminal nature in the Roman god whose very name encodes the concept of passageway and transition.
, The Inner World of Trauma: Archetypal Defences of the Personal Spirit, 1996thesis