Bereshis 17:15

15 And Elohim said unto Avraham, As for Sarai thy isha, thou shalt not call her shem Sarai, but Sarah (Princess) shall her shem be.

Bereshis 17:15 Meaning and Commentary

Genesis 17:15

And God said unto Abraham
After he had changed his name, and given him the covenant of circumcision:

as for Sarai thy wife, thou shalt not call her name Sarai, but Sarah
her name [shall be];
her former name Sarai signifies "my princess", or rather "princesses", being to him in the room of many, and better than ten thousand; yet only a princess to him, and in his family, being sole mistress there: but Sarah signifies, as Jarchi observes, "princess" absolutely, because she was princess over all the princes and people that should come of her, as well as be the mother and princess of all female believers, who are called her daughters, ( 1 Peter 3:6 ) .

Bereshis 17:15 In-Context

13 He that is born in thy bais, and he that is bought with thy kesef, must be circumcised; and My Brit shall be in your basar for a Brit Olam.

14 And the arel (uncircumcised) zachar whose basar of his arelah (foreskin) is not circumcised, that nefesh shall be cut off from his people; My Brit hefer (he broke).

15 And Elohim said unto Avraham, As for Sarai thy isha, thou shalt not call her shem Sarai, but Sarah (Princess) shall her shem be.

16 And I will bless her, and give thee ben also of her; yes, will bless her, and she shall give rise to Goyim; melechim of peoples shall be from her.

17 Then Avraham fell upon his face, and yitzchak (laughed), and said in his lev, Shall a child be born unto him that is a hundred shanah? And shall Sarah, that is ninety shanah, bear?