Arithmancy

In modern numerological terminology, arithmancy is a form of divination based on assigning numerical value to a word or phrase,[1] by means of a simplified version of ancient Greek isopsephy or Hebrew/Aramaic gematria, as adapted to the Latin alphabet. Arithmancy is associated with the Chaldeans, Platonists, Pythagoreans, and the Kabbalah.[2][3][4] When arithmancy is applied to a person's name, it is a form of onomancy.

For the use of the word in the Harry Potter books, see Magic in Harry Potter § Arithmancy.

Etymology

The term arithmancy is derived from two Greek words – arithmos (meaning number) and manteia (meaning divination). Arithmancy is thus the study of divination through numbers.[5]

Methods

Pythagorean method

In the Pythagorean method (or Western method), the letters of the Latin alphabet are assigned numerical values 1 through 9 as follows:[6]

1	2	3	4	5	6	7	8	9
A	B	C	D	E	F	G	H	I
J	K	L	M	N	O	P	Q	R
S	T	U	V	W	X	Y	Z

Based on these values, the value for a person's name is calculated. If the result is greater than 9, the values of the digits in the number are added up until it is reduced to a single-digit number.

This is a system used to predict the strengths and weaknesses in a person, by using the heart number, the social/life number, and the character/personality number. The heart number is determined by adding together only the vowels in a person's name. The social number is calculated by using only consonants. The character number is determined when both vowels and consonants are used.

A similar approach is to use the numbers from a person's birthday to derive their character number. Each of these numbers is considered to have a suitable predictive meaning.

Chaldean method

A lesser known method is the Chaldean method (in this context, "Chaldean" is an old-fashioned name for the Aramaic languages and their speakers). The most significant difference between the Agrippan method and the Chaldean method is that the number 9 is not used in the calculations. This method is otherwise similar to the Agrippan method, but the letters were assigned values as follows (partially based on equating Latin letters with letters of the Hebrew alphabet):

1	2	3	4	5	6	7	8
A	B	C	D	E	U	O	F
I	K	G	M	H	V	Z	P
J	R	L	T	N	W
Q		S			X
Y

Agrippan method

Agrippa's numerology table as published in Three Books of Occult Philosophy

Heinrich Cornelius Agrippa applied the concept of arithmancy to the classical Latin alphabet in the 16th century in Three Books of Occult Philosophy. He mapped the letters as follows:[7]

1	2	3	4	5	6	7	8	9
A	B	C	D	E	F	G	H	I
10	20	30	40	50	60	70	80	90
K	L	M	N	O	P	Q	R	S
100	200	300	400	500	600	700	800	900
T	V[lower-alpha 1]	X	Y	Z	I[lower-alpha 2]	V[lower-alpha 3]	HI[lower-alpha 4]	HV[lower-alpha 5]

1. When representing the u sound, as in Ulysses
2. When representing the j sound, as in John
3. When representing the v sound, as in Valentine
4. When representing the j sound, as in Jerome
5. When representing the w sound, as in Wilhelm

Note that the letters U, J, and W were not commonly considered part of the Latin alphabet at the time.

References

1. "number symbolism". Encyclopædia Britannica. Retrieved 29 May 2013.
2. "Name Numerology". Numerology Calculator. Retrieved 29 May 2013.
3. "Arithmancy". TheMystica.com. Retrieved 29 May 2013.
4. "Secrets of Numerology". Carroll E. Macomber. 29 May 2013.
5. "Arithmancy". The Element Encyclopedia of the Psychic World. Harper Element. 2006. p. 31.
6. Christie, Anne (2005). Simply Numerology. New York: Sterling Publishing Company. pp. 10–11. ISBN 140272277X.
7. Agrippa, Heinrich Cornelius (1651) [First published 1533]. Three Books of Occult Philosophy. 2. Translated by French, John. London: Gregory Moule. pp. 235–236.