A familiar spirit is a supernatural entity, animal, or demon believed to act as a companion, assistant, or guide to a practitioner of magic, or to track and influence human family lines. Origin of the Name: The word familiar comes from the Latin familiaris, meaning "domestic" or "household servant," implying a close, personal relationship between the spirit and the practitioner. Definition: In the Hebrew Bible (translating terms like ʾôb), familiar spirits are viewed as spiritual forces, demonic imitations, or entities associated with mediums, necromancy, and forbidden divination. Scriptural Warnings: Passages such as Leviticus 19:31 and Deuteronomy 18:10–11 explicitly warn against turning to mediums, wizards, or those who consult familiar spirits.