Tetragrammaton

Tetragrammaton (τέτταρα, four, and γράμμα, letter), a term to designate the sacred name of the Deity, Jehovah, in four letters, יהוה. By the possession of this name the early Jewish opponents of Christianity declared that the miracles of Christ were performed. Tile mystical word Om of the Buddhists of India and Thibet is supposed to possess similar virtues to the present day.