The name Matsey in Hebrew letters is מציי. 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.
מציי
In short
Your name in Hebrew letters is מציי. The name Maciej comes from Hebrew: its root, the word Matityahu, means “gift of God”. It is a boy's name that is found mostly in Poland. In Hebrew it is written by sound. Adding up the numbers of its letters gives 150 — the same as the Torah word יסף, “to add”. That number points to Torah page 150 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 “Matsey” — this exact spelling is what was calculated: מציי. 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 מציי gives 150.
150
The number 150 is the Torah word יסף — «to add» (Genesis 4:2).
And when all the people saw the pillar of cloud stand at the door of the Tent, all the people rose up and worshipped, every man at his tent door.
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.
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) — 150. A Torah word with the same number is יסף — “to add” (Genesis 4:2).
Reduced, each letter to one digit (mispar katan) — 15. A Torah word with the same number is זוב — “to flow” (Exodus 3:8).
Ordinal: alef 1, bet 2 … tav 22 (mispar siduri) — 51. A Torah word with the same number is אכל — “to eat” (Genesis 2:16).
Cumulative: a letter plus all letters before it (mispar kidmi) — 750. A Torah word with the same number is נתש — “to uproot” (Deuteronomy 29:27).
Squares of the letter values (mispar perati) — 9900.
Building: the sum grows with each letter (mispar bone’eh) — 460. A Torah word with the same number is יקשן — “Jokshan, son of Abraham” (Genesis 25:2).
The letters that come out are יהממ — not a word that stands in the Pentateuch. Atbash: letters mirrored, alef for tav, bet for shin, and the number of the resulting word — 95. A Torah word with the same number is יפה — “beautiful” (Genesis 12:11).
Filling: the names of the letters are counted — alef, bet, gimel… (milui) — 224. A Torah word with the same number is דרך — “way, road” (Genesis 3:24).
The number 150 appears in the classical books 19 times across 15 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 — 150. 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. מציי has 4 letters: מ Mem, צ Tsadi, י Yod, 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 מציי 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 מציי 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”.
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.
