The Pythagorean system

The Pythagorean table is straightforward: the twenty-six letters of the Latin alphabet are mapped to the digits one through nine in order, and when you run out of digits you start again. So A is one, B is two, C is three, D is four, E is five, F is six, G is seven, H is eight, I is nine. Then J is one, K is two, L is three, M is four, N is five, O is six, P is seven, Q is eight, R is nine. Then S is one, T is two, U is three, V is four, W is five, X is six, Y is seven, Z is eight. The cycle is unbroken; every letter has a value.

There is a single fork in the road, and it is about vowels. For Soul Urge and Personality numbers, you need to separate vowels from consonants. A, E, I, O and U are always vowels. Y is sometimes a vowel and sometimes a consonant, depending on the surrounding letters. Most modern Pythagorean writers — Hans Decoz prominent among them — treat Y as a vowel when it produces a vowel sound (Mary, Lynn) and as a consonant when it produces a consonant sound (Yvette, Yolanda). Others always count it one way for simplicity. We follow the sound-based rule because it gives more honest Soul Urge readings.

This is interpretive, not predictive. The table does not magic a digit out of a letter; it is a convention agreed by a tradition. What makes the convention interesting is what people have observed when they apply it consistently to thousands of names. The patterns the practitioners report — Three names that produce performers, Eight names that produce financiers — are why the table has survived.

Pythagorean is not the only system. The older Chaldean tradition, with roots in Babylon, assigns letters differently — by sound rather than alphabetical order — and uses only the digits one through eight, treating nine as sacred and reserving it for special calculations. Cheiro, the late-Victorian society palmist whose books are still in print, was a Chaldean man. He read for King Edward VII, Mark Twain and Oscar Wilde, all by the Chaldean table.

The two systems will often produce different numbers for the same name. Which is right? Neither, in the sense that the question expects. They are different lenses on the same underlying claim — that letters carry numbers and numbers carry character. The Pythagorean table is the one most modern English-language books use because it is regular and easy to learn. The Chaldean table is sound-based and arguably more sensitive to how a name is actually spoken, at the cost of being harder to memorise. We use Pythagorean throughout Numerologia unless we are explicitly working in the older tradition.

If you are reading numerology for self-understanding rather than ceremony, our recommendation is to pick one system and stay with it. Calculating a name in both and then looking for confirmation is a recipe for the Barnum effect: you will find what you are already looking for.