2. Black Smoke Jinns
4. Legions of the Devil
6. Shades from Underworld
7. Legions of Yamaraja (the god of death)
8. Incubi/Succubi (in their original form without other manifestations)
9. Self-Shadow Doppelgangers
11. Tsalmaveth (shadow of death - according to some interpretations)
Although many cultures considered them demons but some very few cultures also considered them ghosts. With so many different names there was no need to invent another misleading name as "Shadow People" just to dupe people into believing that an alien race was suddenly showing interest in human beings. A misleading term as they are neither shadows (as they look more like black plasma not 2-dimensional shadows), nor people (unlike human people as they were considered 'spirits').
Edited by XingWi, 24 October 2012 - 10:28 PM.