Are there other angels who are represented as deities in other religions? An angel of the underworld perhaps?

Answer 1

Very good possibility.
And wouldn't that tend to indicate that at one time there was only one belief?
Could it be that, over time, as people drifted apart, that their beliefs slowly moved away from the original?
If that is true, I'd think God would have to choose one race to keep the original belief in Him fairly "pure"...

Answer 2

The big 3 all believe in Lucifer. In older mythologies, heroes and gods became angels. Here's an excerpt from the link below:

For the next several centuries, scholars identified, wrote about, and classified angels. Angelogy went amok in the 11th through 13th centuries. Jewish mystics (kabbalists) and Christian scholars named angels, created hierarchies, and determined sub-orders within hierarchies. The quantity of literature is staggering. Davidson suggests that angels were invented by (1) mixing some letters of the Hebrew alphabet, often through an anagram or acronym; and (2) adding the term -el (meaning "of God") or -irion to the end. Thus Hod ("splendor") became Hodiel ("Splendor of God"). Gevurah ("strength") became Gevurael, Cherubiel became the eponymous leader of the order of cherubim and Seraphiel ditto of the seraphim.

The names of hundreds of angels were created in this fashion. Greek, Babylonian, Persian, and Roman gods and heroes became angels. The Greek god Hermes became the holy Hemesiel and Nergal the Akkadian lord of the underworld became the angel Nasargiel. Angels appeared in religious and secular literature, and some achieved canonical status.

Answer 3

Yes plenty,pick up a book on demonology if that is what you want.

Answer 4

Most definately. His name is Baal, Beelzebub and other names such as Satan and Devil.

Answer 5

Perhaps, but since there is only one God, those other religions would have to be wrong.

Answer 6

persephone is the goddess of the underworld. bow to me.