Sarah. The addition of the 5th letter (= H) of Hebrew alphabet (the No. of Grace, App-10) as in Abraham's case (Genesis 17:5) and Joshua's (Numbers 13:16). The letter (H) is common to both the names of Jehovah and Elohim. Sarai. princely; Sarah. princess.
Related Commentaries of Genesis 17:15
Genesis 17:15
15 And God said unto Abraham, As for Sarai thy wife, thou shalt not call her name Sarai, but Sarahe shall her name be.