The name Mattenai in Hebrew letters is מתני. Below: how its number adds up, which page of the Torah it falls on and what verse stands there. Everything is computed, nothing is guessed.
מתני
In short
Your name in Hebrew letters is מתני. A Tanakh name: the name of three Israelites (first in Ezra 10:33; 3 mentions in the Tanakh). Meaning, per Strong’s dictionary (1890): “liberal”. Adding up the numbers of its letters gives 500 — the same as the Torah word נתן, “to give”. That number points to Torah page 146 of 354 — in the portion Ki Tisa. What that portion is about: The half-shekel for the census; the golden calf and the broken tablets; the thirteen attributes of mercy; the second tablets. The verse that begins with the first letter of your name and ends with the last is Exodus 22:28. Each of these steps is laid out below with its sources. Every figure can be checked by hand.
You wrote “Mattenai” — this exact spelling is what was calculated: מתני. A name from the Tanakh — its Tanakh spelling is used. If your name is spelled differently, correct the Hebrew spelling and the report is recomputed.
Adding up the letters of the name מתני gives 500.
500
The number 500 is the Torah word נתן — «to give» (Genesis 1:17).
'See, I have called by name Bezalel the son of Uri, the son of Hur, of the tribe of Judah;
This is from the portion Ki Tisa. What it is about: The half-shekel for the census; the golden calf and the broken tablets; the thirteen attributes of mercy; the second tablets.
The same number, 500, is given by these Tanakh names:
Nathan נתן
Other ways of counting
The tradition counts the same name in several ways. The main one is above: each letter is its number. The other eight are old and checkable too; each gives its own number, and many of them have a Torah word with the same number.
Final letters as 500–900 (mispar gadol) — 500. A Torah word with the same number is נתן — “to give” (Genesis 1:17).
Reduced, each letter to one digit (mispar katan) — 14. A Torah word with the same number is יד — “hand” (Genesis 3:22).
Cumulative: a letter plus all letters before it (mispar kidmi) — 1890.
Squares of the letter values (mispar perati) — 164200.
Building: the sum grows with each letter (mispar bone’eh) — 1470.
The letters that come out are יאטמ — not a word that stands in the Pentateuch. Atbash: letters mirrored, alef for tav, bet for shin, and the number of the resulting word — 60. A Torah word with the same number is ילך — “he will go” (Genesis 3:14).
Filling: the names of the letters are counted — alef, bet, gimel… (milui) — 612. A Torah word with the same number is ברית — “covenant” (Genesis 6:18).
The number 500 appears in the classical books 17 times across 8 works. The earliest mention is ספר קרניים (~1400).
Every letter of the name explained, the words and namesakes with references, the Hebrew date, the letter and tribe of the month, day 861 of your life (±1), the psalm by age, the attestations from the classical books — a PDF sent to your email.
The number of the day, every morning
Every date has a number too. Once a year it will match the number of your name — 500. The channel posts one number a day, one verse and the Torah page it lands on. Nothing after it, no mailing list.
Hebrew is written from right to left. מתני has 4 letters: מ Mem, ת Tav, נ Nun, י Yod. The first letter is Mem, the last is Yod.
For an engraving, a sign or a tattoo, show the spelling to someone who reads Hebrew: transliterating a name is a choice, not the only option.
The name מתני does not stand as a word in the Pentateuch — as with most names, including many Tanakh names from the later books.
The verse of your name
There is a custom: at the end of the prayer one says a Torah verse that begins with the first letter of one's name and ends with its last. For מתני these are מ and י. The Pentateuch has 2 such verses. The first of them is Exodus 22:28:
מלאתך ודמעך לא תאחר בכור בניך תתן לי
This is from the portion Mishpatim. What it is about: Laws of the servant, damages, theft and pledges; “an eye for an eye” as compensation; the sabbatical year; “we will do and we will hear”.
The name מתני has no such day. The numbers of the dates in a year cover 326 values out of 940, and 500 is not among them. Half of all names are like this — neither good nor bad, just a fact of counting.
Add a date of birth and the verse of meeting from that week's portion is added to the reading.
Each Hebrew letter has a number; a word's number is their sum (alef 1 … tav 400). The page is the remainder modulo 354: the Torah divided into 354 pages of 861 letters, as the lunar year has 354 days. Everything can be checked by hand.