Where a date stops and a name is required
Three of the numbers a full reading quotes cannot be got from a birth date at all. They are sums over the letters of a name, and no rearrangement of a date produces them. This page shows the table, works a name through it, and gives the one-question test for a site that offers you these numbers without asking what you are called.
The letter table, and a name added up
The table used in English-language numerology lays the alphabet over 1 to 9 in order and then starts again: a=1, b=2, c=3, d=4, e=5, f=6, g=7, h=8, i=9, then j=1 through r=9, then s=1 through z=8.
That leaves the table lopsided in a way worth noticing. Eight of the nine digits carry three letters each; 9 carries only two, i and r, because the alphabet runs out two letters short of a third full pass.
ANNA: a=1, n=5, n=5, a=1. The total is 12, then 1 + 2 = 3.
Its vowels, a and a, add to 2. Its consonants, n and n, add to 10, then 1 + 0 = 1.
Before any reducing, the vowel total and the consonant total add back to the whole-name total: 2 + 10 = 12. That holds for every name, and it is the quickest test that a set of three name figures was calculated rather than filled in. The three are named after those three sums: the whole name gives the expression number, the vowels the soul urge, the consonants the personality number.
What the tradition reads into the three
In this tradition the split is read as inside against outside. The vowel sum is treated as what somebody is taken to want, the consonant sum as what other people are held to notice first, and the whole-name sum as the two of them together.
The justification usually offered is that vowels carry the sound of a name and consonants shape it — an analogy rather than a derivation, and one that different schools defend in different ways. What matters for reading a result honestly is that the split is a convention about spelling, not a finding about anybody.
The tradition also expects the name figures to be read against the date figures, which is why a full reading quotes both. That is a habit of presentation. Nothing in the arithmetic joins a sum over letters to a sum over digits.
Why no arrangement of a date produces them
A birth date is a short string of digits and contains no letters at all. The table above maps letters to numbers, and it does not run backwards: knowing that a name totals 3 tells you nothing about which letters produced it.
ANNA totals 12 and reduces to 3. MARY is m=4, a=1, r=9, y=7 — a total of 21, which also reduces to 3. Two different names, one expression number, and no route back from the number to either of them. A date cannot supply what the number itself does not preserve.
So a site that offers an expression number, a soul urge or a personality number from a date alone is either calculating something else and mislabelling it, or filling the field from the date and hoping the label goes unread. Asking for the name is not a formality; it is the only place the input can come from.
Which spelling, and the questions the method leaves open
Once a name is required the awkward part follows: which name. The birth certificate, the name used daily, a name taken at marriage, a name transliterated out of another alphabet — each gives different figures, and the method holds nothing that decides between them.
Schools have preferences and state them as rules, which is not the same as having a reason for them. A defensible practice is to work out the versions you care about, note that they differ, and treat the difference as information about the arithmetic rather than about the person.
Two smaller cases have the same shape. Y is 7 in the table, but whether it counts among the vowels is decided school by school: MARY has a soul urge of 1 with y as a consonant and 8 with y as a vowel. And accented or non-Latin letters have tables of their own, so a name in its original script and the same name transliterated are simply two different sums.
Questions about the name figures
- Which name should I use when my documents disagree?
- The method has no rule that settles it. Both versions can be worked out, and if they give different figures that is worth seeing for itself: it shows how much of the number came from a spelling decision rather than from you.
- Is y a vowel here?
- In the table y is 7, and whether it joins the vowels is decided by the school rather than by the arithmetic. MARY gives a soul urge of 1 one way and 8 the other, which is the size of the disagreement in one example.
- Can a name number be 11, 22 or 33?
- Yes. DAVID adds to 4 + 1 + 4 + 9 + 4 = 22, and schools that keep master numbers keep it there instead of reducing to 4. The same master-number convention applies on the letter side as on the date side.
- Does a nickname have its own numbers?
- It has its own sums, since the letters differ. Whether those sums mean anything is exactly the same open question as for the full name; the arithmetic does what it is given and cannot tell one name from another.