According to the Book of Enoch, where do demons come from?

[tonychanyt]

Wiki:

The sources of demonic influence were thought to originate from the Watchers or Nephilim, who are first mentioned in Genesis 6 and are the focus of 1 Enoch Chapters 1–16, and also in Jubilees 10. The Nephilim were seen as the source of the sin and evil on Earth because they are referenced in Genesis 6:4 before the story of the Flood.[52] In Genesis 6:5, God sees evil in the hearts of men. Ethiopic Enoch refers to Genesis 6:4–5, and provides further description of the story connecting the Nephilim to the corruption of humans. According to the Book of Enoch, sin originates when angels descend from heaven and fornicate with women, birthing giants. The Book of Enoch shows that these fallen angels can lead humans to sin through direct interaction or through providing forbidden knowledge. Most scholars understand the text, that demons originate from the evil spirits of the deceased giants, cursed by God to wander the Earth.

 

[Paul4JC]

Disembodied spirits of the first generation Giant's, that is, the evil spirits of the immediate offspring of fallen angels and women.

1:15 Enoch 8 But now the giants who were begotten by the spirits and flesh— they will call them evil spirits on the earth, for their dwelling will be on the earth. 9 The spirits that have gone forth from the body of their flesh are evil spirits, for from humans they came into being, and from the holy watchers was the origin of their creation. Evil spirits they will be on the earth, and evil spirits they will be called. 10 The spirits of heaven, in heaven is their dwelling; but the spirits begotten on the earth, on the earth is their dwelling. 11 And the spirits of the giants <lead astray>, do violence, make desolate, and attack and wrestle and hurl upon the earth and <cause illnesses>. They eat nothing, but abstain from food and are thirsty and smite. 12/ These spirits (will) rise up against the sons of men and against the women, for they have come forth from them.

Nickelsburg, George W.E.; VanderKam, James C.. 1 Enoch: The Hermeneia Translation (p. 37). Fortress Press.

 

[Semper-Fi]

According to the bible: kind reproduce after its kind.
A human and an angel cannot reproduce.