Jason, the word Demon comes from Daemon, which in turn originates well before the modern concept of hell. It is a greek word for spirits that can be both good and evil, and are frequently the source of whim and imagination. It began to have negative associations as Persian influences and religion started to associate such things as evil - Zoroastrianism began to portray numerous different faiths and local spirits as evil if they did not fit into their monotheistic view of good vs. evil, as they developed the first monotheistic religion.
The demon concept was then born and subsequently evolved within medieval Christianity, along with the various concepts of Hell and Satan, Lucifer, and "The Devil." The names of various pagan deities,local spirits, divas, etc. are frequently all found together in the lists that we traditionally accept as studies in demonology, with descriptions that are based rather deeply on stereotype, fear and personal perception.
And then we have the various Satanic views, which are frequently obscured in modern conception and belief and frequently have little historic origin or links beyond what the individual or group attaches to it.
We've all got our own paths to Gnosis though, so view the demon however you'd like.