Genesis 17:15

15 And God said to Abraam, Sara thy wife—her name shall not be called Sara, Sarrha shall be her name.

Genesis 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 ) .

Genesis 17:15 In-Context

13 He that is born in thy house, and he that is bought with money shall be surely circumcised, and my covenant shall be on your flesh for an everlasting covenant.
14 And the uncircumcised male, who shall not be circumcised in the flesh of his foreskin on the eighth day, that soul shall be utterly destroyed from its family, for he has broken my covenant.
15 And God said to Abraam, Sara thy wife—her name shall not be called Sara, Sarrha shall be her name.
16 And I will bless her, and give thee a son of her, and I will bless him, and he shall become nations, and kings of nations shall be of him.
17 And Abraam fell upon his face, and laughed; and spoke in his heart, saying, Shall there be a child to one who is a hundred years old, and shall Sarrha who is ninety years old, bear?

The Brenton translation of the Septuagint is in the public domain.