Lech Lecha, the Power of Names
The power of giving and changing names
(יט) וַיִּ֩צֶר֩ יְהֹוָ֨ה אֱלֹהִ֜ים מִן־הָֽאֲדָמָ֗ה כׇּל־חַיַּ֤ת הַשָּׂדֶה֙ וְאֵת֙ כׇּל־ע֣וֹף הַשָּׁמַ֔יִם וַיָּבֵא֙ אֶל־הָ֣אָדָ֔ם לִרְא֖וֹת מַה־יִּקְרָא־ל֑וֹ וְכֹל֩ אֲשֶׁ֨ר יִקְרָא־ל֧וֹ הָֽאָדָ֛ם נֶ֥פֶשׁ חַיָּ֖ה ה֥וּא שְׁמֽוֹ׃ (כ) וַיִּקְרָ֨א הָֽאָדָ֜ם שֵׁמ֗וֹת לְכׇל־הַבְּהֵמָה֙ וּלְע֣וֹף הַשָּׁמַ֔יִם וּלְכֹ֖ל חַיַּ֣ת הַשָּׂדֶ֑ה וּלְאָדָ֕ם לֹֽא־מָצָ֥א עֵ֖זֶר כְּנֶגְדּֽוֹ׃
(19) And the LORD God formed out of the earth all the wild beasts and all the birds of the sky, and brought them to the man to see what he would call them; and whatever the man called each living creature, that would be its name. (20) And the man gave names to all the cattle and to the birds of the sky and to all the wild beasts; but for Adam no fitting helper was found.
From Chabad.org:
A person’s Hebrew name is their life-force, and therefore has a tremendous impact on that person. The Kabbalists explain2 that when a child is born, a kind of spirit of prophecy rests on the parents, giving them foresight into what name they should give their child. This is because a name is intrinsically connected with the essence of the child, and is a critical component of the person’s makeup.
(א) למה זה תשאל. אֵין לָנוּ שֵׁם קָבוּעַ, מִשְׁתַּנִּים שְׁמוֹתֵנוּ, הַכֹּל לְפִי מִצְוַת עֲבוֹדַת הַשְּׁלִיחוּת שֶׁאָנוּ מִשְׁתַּלְּחִים (בראשית רבה):
(1) למה זה תשאל WHEREFORE IS IT THAT THOU DOST ASK [AFTER MY NAME]? — We have no fixed names; our names change, all depending upon the service we are commanded to carry out as the errand with which we are charged (Genesis Rabbah 78:4).
(יא) וַיֹּ֤אמֶר לָהּ֙ מַלְאַ֣ךְ יְהֹוָ֔ה הִנָּ֥ךְ הָרָ֖ה וְיֹלַ֣דְתְּ בֵּ֑ן וְקָרָ֤את שְׁמוֹ֙ יִשְׁמָעֵ֔אל כִּֽי־שָׁמַ֥ע יְהֹוָ֖ה אֶל־עׇנְיֵֽךְ׃ (יב) וְה֤וּא יִהְיֶה֙ פֶּ֣רֶא אָדָ֔ם יָד֣וֹ בַכֹּ֔ל וְיַ֥ד כֹּ֖ל בּ֑וֹ וְעַל־פְּנֵ֥י כׇל־אֶחָ֖יו יִשְׁכֹּֽן׃ (יג) וַתִּקְרָ֤א שֵׁם־יְהֹוָה֙ הַדֹּבֵ֣ר אֵלֶ֔יהָ אַתָּ֖ה אֵ֣ל רֳאִ֑י כִּ֣י אָֽמְרָ֗ה הֲגַ֥ם הֲלֹ֛ם רָאִ֖יתִי אַחֲרֵ֥י רֹאִֽי׃

(11) The angel of the LORD said to her further,
“Behold, you are with child
And shall bear a son;
You shall call him Ishmael,
For the LORD has paid heed to your suffering.
(12) He shall be a wild ass of a man;
His hand against everyone,
And everyone’s hand against him;
He shall dwell alongside of all his kinsmen.”
(13) And she called the LORD who spoke to her, “You Are El-roi,” by which she meant, “Have I not gone on seeing after He saw me!”-d

(ג) וַיִּפֹּ֥ל אַבְרָ֖ם עַל־פָּנָ֑יו וַיְדַבֵּ֥ר אִתּ֛וֹ אֱלֹהִ֖ים לֵאמֹֽר׃ (ד) אֲנִ֕י הִנֵּ֥ה בְרִיתִ֖י אִתָּ֑ךְ וְהָיִ֕יתָ לְאַ֖ב הֲמ֥וֹן גּוֹיִֽם׃ (ה) וְלֹא־יִקָּרֵ֥א ע֛וֹד אֶת־שִׁמְךָ֖ אַבְרָ֑ם וְהָיָ֤ה שִׁמְךָ֙ אַבְרָהָ֔ם כִּ֛י אַב־הֲמ֥וֹן גּוֹיִ֖ם נְתַתִּֽיךָ׃ (ו) וְהִפְרֵתִ֤י אֹֽתְךָ֙ בִּמְאֹ֣ד מְאֹ֔ד וּנְתַתִּ֖יךָ לְגוֹיִ֑ם וּמְלָכִ֖ים מִמְּךָ֥ יֵצֵֽאוּ׃
(3) Abram threw himself on his face; and God spoke to him further, (4) “As for Me, this is My covenant with you: You shall be the father of a multitude of nations. (5) And you shall no longer be called Abram, but your name shall be Abraham, for I make you the father of a multitude of nations. (6) I will make you exceedingly fertile, and make nations of you; and kings shall come forth from you.
(טו) וַיֹּ֤אמֶר אֱלֹהִים֙ אֶל־אַבְרָהָ֔ם שָׂרַ֣י אִשְׁתְּךָ֔ לֹא־תִקְרָ֥א אֶת־שְׁמָ֖הּ שָׂרָ֑י כִּ֥י שָׂרָ֖ה שְׁמָֽהּ׃ (טז) וּבֵרַכְתִּ֣י אֹתָ֔הּ וְגַ֨ם נָתַ֧תִּי מִמֶּ֛נָּה לְךָ֖ בֵּ֑ן וּבֵֽרַכְתִּ֙יהָ֙ וְהָֽיְתָ֣ה לְגוֹיִ֔ם מַלְכֵ֥י עַמִּ֖ים מִמֶּ֥נָּה יִהְיֽוּ׃ (יז) וַיִּפֹּ֧ל אַבְרָהָ֛ם עַל־פָּנָ֖יו וַיִּצְחָ֑ק וַיֹּ֣אמֶר בְּלִבּ֗וֹ הַלְּבֶ֤ן מֵאָֽה־שָׁנָה֙ יִוָּלֵ֔ד וְאִ֨ם־שָׂרָ֔ה הֲבַת־תִּשְׁעִ֥ים שָׁנָ֖ה תֵּלֵֽד׃ (יח) וַיֹּ֥אמֶר אַבְרָהָ֖ם אֶל־הָֽאֱלֹהִ֑ים ל֥וּ יִשְׁמָעֵ֖אל יִחְיֶ֥ה לְפָנֶֽיךָ׃ (יט) וַיֹּ֣אמֶר אֱלֹהִ֗ים אֲבָל֙ שָׂרָ֣ה אִשְׁתְּךָ֗ יֹלֶ֤דֶת לְךָ֙ בֵּ֔ן וְקָרָ֥אתָ אֶת־שְׁמ֖וֹ יִצְחָ֑ק וַהֲקִמֹתִ֨י אֶת־בְּרִיתִ֥י אִתּ֛וֹ לִבְרִ֥ית עוֹלָ֖ם לְזַרְע֥וֹ אַחֲרָֽיו׃

(15) And God said to Abraham, “As for your wife Sarai, you shall not call her Sarai, but her name shall be Sarah. (16) I will bless her; indeed, I will give you a son by her. I will bless her so that she shall give rise to nations; rulers of peoples shall issue from her.” (17) Abraham threw himself on his face and laughed, as he said to himself, “Can a child be born to a man a hundred years old, or can Sarah bear a child at ninety?” (18) And Abraham said to God, “O that Ishmael might live by Your favor!” (19) God said, “Nevertheless, Sarah your wife shall bear you a son, and you shall name him Isaac; and I will maintain My covenant with him as an everlasting covenant for his offspring to come.

(ה) וְאַבְרָהָ֖ם בֶּן־מְאַ֣ת שָׁנָ֑ה בְּהִוָּ֣לֶד ל֔וֹ אֵ֖ת יִצְחָ֥ק בְּנֽוֹ׃ (ו) וַתֹּ֣אמֶר שָׂרָ֔ה צְחֹ֕ק עָ֥שָׂה לִ֖י אֱלֹהִ֑ים כׇּל־הַשֹּׁמֵ֖עַ יִֽצְחַק־לִֽי׃ (ז) וַתֹּ֗אמֶר מִ֤י מִלֵּל֙ לְאַבְרָהָ֔ם הֵינִ֥יקָה בָנִ֖ים שָׂרָ֑ה כִּֽי־יָלַ֥דְתִּי בֵ֖ן לִזְקֻנָֽיו׃
(5) Now Abraham was a hundred years old when his son Isaac was born to him. (6) Sarah said, “God has brought me laughter; everyone who hears will laugh with me.” (7) And she added,
“Who would have said to Abraham
That Sarah would suckle children!
Yet I have borne a son in his old age.”
Likutei Moharan 56:3:8—Rebbe Nachman of Brezlov
(8) We merit this through Torah study. This is because the Torah is the Name of God, and the name of a thing is its vessel; within this name is contained the life force of that thing. As it is written, “living soul that is its name” (Genesis 2:19)—contained in the name of each thing is its soul and life force. This is why when we call a person by his name, we gain his attention immediately, because his total soul and life force are contained within his name.
Midrash Tanchuma, Vayakhel 1:1
R. Meir said: For every good deed a man performs, an angel is assigned to watch over him. If he does one good deed, one angel is assigned to him, and if he performs many good deeds, many angels are assigned to him, as it is said: For he will give His angels charge over you (Ps. 91:11). Every time a person increases the number of good deeds they performs,they adds to their good name. You find that a person is known by three names: the name by which their parents call them, the name by which other people call them, and the one they earn for themselves; the most important name is the name one earns for oneself.
וְאָמַר רַבִּי יִצְחָק: אַרְבָּעָה דְּבָרִים מְקָרְעִין גְּזַר דִּינוֹ שֶׁל אָדָם, אֵלּוּ הֵן: צְדָקָה, צְעָקָה, שִׁינּוּי הַשֵּׁם, וְשִׁינּוּי מַעֲשֶׂה. צְדָקָה, דִּכְתִיב: ״וּצְדָקָה תַּצִּיל מִמָּוֶת״. צְעָקָה, דִּכְתִיב: ״וַיִּצְעֲקוּ אֶל ה׳ בַּצַּר לָהֶם וּמִמְּצוּקוֹתֵיהֶם יוֹצִיאֵם״. שִׁינּוּי הַשֵּׁם, דִּכְתִיב: ״שָׂרַי אִשְׁתְּךָ לֹא תִקְרָא אֶת שְׁמָהּ שָׂרָי כִּי שָׂרָה שְׁמָהּ״, וּכְתִיב: ״וּבֵרַכְתִּי אוֹתָהּ וְגַם נָתַתִּי מִמֶּנָּה לְךָ בֵּן״. שִׁינּוּי מַעֲשֶׂה, דִּכְתִיב: ״וַיַּרְא הָאֱלֹהִים אֶת מַעֲשֵׂיהֶם״, וּכְתִיב: ״וַיִּנָּחֶם הָאֱלֹהִים עַל הָרָעָה אֲשֶׁר דִּבֶּר לַעֲשׂוֹת לָהֶם וְלֹא עָשָׂה״.

And Rabbi Yitzḥak said: A person’s sentence is torn up on account of four types of actions. These are: Giving charity, crying out in prayer, a change of one’s name, and a change of one’s deeds for the better...a change of one’s name, as it is written: “As for Sarai your wife, you shall not call her name Sarai, but Sarah shall her name be” (Genesis 17:15), and it is written there: “And I will bless her, and I will also give you a son from her” (Genesis 17:16);