The Bible makes it clear concerning the reality of demons and or evil spirits.
Yet there is no information in the Bible regarding their origin. Although Scripture does not tell us specifically where they came from, there are many theories as to where they came from. Here are 4.
1. Disembodied Spirits of a Pre-Adamic Race
A popular theory is that the demons are disembodied spirits of some race that existed before Adam, A race of people who were destroyed by God because they were so evil. These could be spirit-beings that are separate from fallen angels. It is believed that demons existed at another place and time in bodily form, but are now disembodied spirits looking for bodies to possess. This could be so, but there is no scripture reference at all to it.