The name Rostom in Hebrew letters is רוסטום. 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.
רוסטום
In short
Your name in Hebrew letters is רוסטום. Adding up the numbers of its letters gives 321 — the same as the Torah word אשך, “testicle”. That number points to Torah page 321 of 354 — in the portion Re'eh. What that portion is about: “See”: blessing and curse; one place of worship; the tithe; permitted food; the three pilgrimage festivals. The verse that begins with the first letter of your name and ends with the last is Genesis 47:22. Each of these steps is laid out below with its sources. Every figure can be checked by hand.
You wrote “Rostom” — this exact spelling is what was calculated: רוסטום. 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 רוסטום gives 321.
321
The number 321 is the Torah word אשך — «testicle» (Leviticus 21:20).
If there be among you a needy man, one of thy brethren, within any of thy gates, in thy land which HaShem thy G-d giveth thee, thou shalt not harden thy heart, nor shut thy hand from thy needy brother;
This is from the portion Re'eh. What it is about: “See”: blessing and curse; one place of worship; the tithe; permitted food; the three pilgrimage festivals.
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) — 881. A Torah word with the same number is שקערורה — “depression, hollow” (Leviticus 14:37).
Reduced, each letter to one digit (mispar katan) — 33. A Torah word with the same number is גל — “heap of stones” (Genesis 31:46).
Ordinal: alef 1, bet 2 … tav 22 (mispar siduri) — 69. A Torah word with the same number is אביון — “poor, needy” (Exodus 23:6).
Cumulative: a letter plus all letters before it (mispar kidmi) — 1282.
Squares of the letter values (mispar perati) — 45353.
Building: the sum grows with each letter (mispar bone’eh) — 1549.
The letters that come out are גפחנפי — not a word that stands in the Pentateuch. Atbash: letters mirrored, alef for tav, bet for shin, and the number of the resulting word — 231. A Torah word with the same number is וצפנה — “and northward” (Genesis 28:14).
Filling: the names of the letters are counted — alef, bet, gimel… (milui) — 1153.
The number 321 appears in the classical books 7 times across 7 works. The earliest mention is ספר חסידים (~1200).
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 — 321. 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. רוסטום has 6 letters: ר Resh, ו Vav, ס Samekh, ט Tet, ו Vav, ם final Mem. The first letter is Resh, the last is final Mem.
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 רוסטום 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 רוסטום these are ר and מ. The Pentateuch has 7 such verses. The first of them is Genesis 47:22:
רק אדמת הכהנים לא קנה כי חק לכהנים מאת פרעה ואכלו את חקם אשר נתן להם פרעה על כן לא מכרו את אדמתם
This is from the portion Vayigash. What it is about: Judah pleads for Benjamin; Joseph reveals himself to his brothers; Jacob goes down to Egypt; the family settles in Goshen.
Any name written in Hebrew letters is a number: רוסטום = 321. And every date has a number of its own. There is a day in the year when the two coincide.
«If there be among you a needy man, one of thy brethren, within any of thy gates, in thy land which HaShem thy G-d giveth thee, thou shalt not harden thy heart, nor shut thy hand from thy needy brother;»
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.