The Exorcism of Emily Rose '6 demons'

For those who have seen this movie.
During the Emily's exorcism, when she cries out the name of the six demons, i looked up info on the the six. The movie is Biblical of course and all of these demons are extracts from the bible.
For those ineterested about the 6 Demons:
1= Cain
> The first son of Adam & Eve. Cain murdered his brother.
2= Nero
> A Roman who burned Christians.
3=Judas
> A disciple of of Jesus. He betrayed Jesus at the last supper.
4=Legion
> Described in the bible as "Possessed by an evil spirit."
5=Belial
> The Demon of Lies and Guilt.
6= Lucifer
> The devil in the flesh..

Demons are the angels that were thrown out of Heaven with the devil. Cain, Nero and Judas were once human and can't be demons.

this film was awesome and scared the crap out of me

They way I see it is, she was possessed by the demonic spirit that resided in Cain, Nero, and Judas. So when their names are called, it's not the human form, but the demon that was responsible for their actions.