Neither shall thy name any more be called Abram, but thy name shall be (b) Abraham; for a father of many nations have I made thee.
(b) The changing of his name is a seal to confirm God's promise to him.
Related Commentaries of Genesis 17:5
Genesis 17:5
5 Neither shall thy name any more be called Abram, but thy name shall be Abraham;c for a father of many nations have I made thee.