The Fourth Book of Occult Philosophy

...falls upon the line of figures, it shall be increased in this manner: Take the number of the position this letter holds in the order of the name, and multiply it by the number of the position this letter holds in the order of the Alphabet; then let the total be divided by nine. The remainder indicates the figure or number to be placed in the Character|A magical seal or signature believed to represent the essence or "calling card" of a celestial being. For there may be placed either a Geometric figure or an Arithmetic numeral figure, which nevertheless must not exceed the Novenary|The number nine; in this system, calculations are often "cast out" by nines, similar to modern modular arithmetic, to keep values within a 1–9 range, or nine angles.

Characters of Good Spirits.