Your name in the Torah: in Hebrew letters, as a number, with the verse it lands on and the sources. Computed, not divined. Free.
לואיזה
Spelling attested: this is how the name is recorded in the open Wikidata name base.
In short
Your name in Hebrew letters is לואיזה. Louisa is a name of Germanic origin, from “hlud + wig”, which means “famous + battle”. The American writer Louisa May Alcott, author of “Little Women”, had this name. In Hebrew it is written by sound. Adding up the numbers of its letters gives 59. That number points to Torah page 59 of 354 — in the portion Vayishlach. What that portion is about: Wrestling with the angel and the name Israel; the meeting with Esau; Dinah in Shechem; the birth of Benjamin and Rachel's death. The verse that begins with the first letter of your name and ends with the last is Genesis 49:18. Each of these steps is laid out below with its sources. Every figure can be checked by hand.
You wrote “Louisa” — this exact spelling is what was calculated: לואיזה. The customary Hebrew spelling of this name. If your name is spelled differently, correct the Hebrew spelling and the report is recomputed.
Adding up the letters of the name לואיזה gives 59.
59
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This number is shared with 11 other name(s) out of the 2,980 in the index.
The number 59, as the remainder modulo 354, points to Torah page 59 in the book of Bereshit (Genesis).
The verse this place falls on is Bereshit (Genesis) 34:16:
וְנָתַנּוּ אֶת־בְּנֹתֵינוּ לָכֶם וְאֶת־בְּנֹתֵיכֶם נִקַּח־לָנוּ וְיָשַׁבְנוּ אִתְּכֶם וְהָיִינוּ לְעַם אֶחָד
then will we give our daughters unto you, and we will take your daughters to us, and we will dwell with you, and we will become one people.
This is from the portion Vayishlach. What it is about: Wrestling with the angel and the name Israel; the meeting with Esau; Dinah in Shechem; the birth of Benjamin and Rachel's death.
The same number, 59, is given by these Tanakh names:
Dana דנה
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) — 59.
Reduced, each letter to one digit (mispar katan) — 23.
Ordinal: alef 1, bet 2 … tav 22 (mispar siduri) — 41. A Torah word with the same number is אם — “if” (Genesis 4:7).
Cumulative: a letter plus all letters before it (mispar kidmi) — 225. A Torah word with the same number is כרה — “to dig” (Genesis 26:25).
Squares of the letter values (mispar perati) — 1111.
Building: the sum grows with each letter (mispar bone’eh) — 263. A Torah word with the same number is סגר — “to shut, close” (Genesis 2:21).
The letters that come out are כפתמעצ — not a word that stands in the Pentateuch. Atbash: letters mirrored, alef for tav, bet for shin, and the number of the resulting word — 700. A Torah word with the same number is כפרת — “mercy seat, cover” (Exodus 25:17).
Filling: the names of the letters are counted — alef, bet, gimel… (milui) — 290. A Torah word with the same number is פרי — “fruit” (Genesis 1:11).
The number 59 appears in the classical books 4 times across 4 works. The earliest mention is מגלה צפונות (~1700).
The name לואיזה 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 לואיזה these are ל and ה. The Pentateuch has 27 such verses. The first of them is Genesis 49:18:
לישועתך קויתי ה׳
This is from the portion Vayechi. What it is about: Jacob blesses Ephraim and Manasseh and all his sons; Jacob's death and burial in Hebron; Joseph's death.
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.
Binyamin Pichkhadze, «Chumash 354» (חומש 354), Bnei Brak, 2002 · Addition, not prophecy.