John Gill, on Gen 17:15

“God said also to Abraham: Sarai thy wife thou shalt not call Sarai, but Sara.”

“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, Pe1 3:6.”

Imported from an open dataset — not yet checked against the printed edition.