Demon I think comes from the Latin meaning “Show” and “money” also comes from “demonstra” to "show or represent value,from in terms of the hellish entity comes from “Demonic spirits” as in "the ones who show themselves, as opposed to the spirits that don’t show themselves. “Monster” comes from monstra, which is from demonstra, a monster is a specific spirit that shows itself.
You can’t spell “demonstrations” without “demon” (or “monstra”).
I had a d&d one shot character named daemos monstra, he was an edge lord celestial warlock with a little unicorn familiar
Demon I think comes from the Latin meaning “Show” and “money” also comes from “demonstra” to "show or represent value,from in terms of the hellish entity comes from “Demonic spirits” as in "the ones who show themselves, as opposed to the spirits that don’t show themselves. “Monster” comes from monstra, which is from demonstra, a monster is a specific spirit that shows itself.