The name Joah in Hebrew letters is יואח. 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.
יואח
In short
Your name in Hebrew letters is יואח. A Tanakh name: the name of four Israelites (first in 2 Kings 18:18; 11 mentions in the Tanakh). Meaning, per Strong’s dictionary (1890): “God is brother”. Adding up the numbers of its letters gives 25 — the same as the Torah word כה, “thus, so”. That number points to Torah page 25 of 354 — in the portion Vayera. What that portion is about: Three visitors at Abraham's tent; the plea for Sodom; the birth of Isaac; the binding of Isaac on Mount Moriah. The verse that begins with the first letter of your name and ends with the last is Isaiah 26:3. Each of these steps is laid out below with its sources. Every figure can be checked by hand.
You wrote “Joah” — this exact spelling is what was calculated: יואח. 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 יואח gives 25.
25
The number 25 is the Torah word כה — «thus, so» (Genesis 15:5).
And I will fetch a morsel of bread, and stay ye your heart; after that ye shall pass on; forasmuch as ye are come to your servant.' And they said: 'So do, as thou hast said.'
This is from the portion Vayera. What it is about: Three visitors at Abraham's tent; the plea for Sodom; the birth of Isaac; the binding of Isaac on Mount Moriah.
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.
with finals and ordinal — 25. A Torah word with the same number is כה — “thus, so” (Genesis 15:5).
Reduced, each letter to one digit (mispar katan) — 16. A Torah word with the same number is אחז — “to seize” (Genesis 22:13).
Cumulative: a letter plus all letters before it (mispar kidmi) — 113. A Torah word with the same number is חקה — “statute” (Genesis 26:5).
Squares of the letter values (mispar perati) — 201. A Torah word with the same number is מקנהו — “his livestock” (Genesis 31:18).
Building: the sum grows with each letter (mispar bone’eh) — 68. A Torah word with the same number is חלל — “to begin” (Genesis 4:26).
The letters that come out are מפתס — not a word that stands in the Pentateuch. Atbash: letters mirrored, alef for tav, bet for shin, and the number of the resulting word — 580. A Torah word with the same number is שעיר — “hairy; male goat” (Genesis 27:11).
Filling: the names of the letters are counted — alef, bet, gimel… (milui) — 561. A Torah word with the same number is תועפה — “strength, horns” (Numbers 23:22).
The number 25 appears in the classical books 9 times across 8 works. The earliest mention is בעל הטורים על התורה (~1300).
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 — 25. 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. יואח has 4 letters: י Yod, ו Vav, א Alef, ח Chet. The first letter is Yod, the last is Chet.
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 יואח 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
The Pentateuch has no verse that begins with י and ends with ח. The custom allows the whole Tanakh — the Prophets and the Writings have 9 such verses. The first of them is Isaiah 26:3:
«And I will fetch a morsel of bread, and stay ye your heart; after that ye shall pass on; forasmuch as ye are come to your servant.' And they said: 'So do, as thou hast said.'»
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.