Jacobs name was changed to Israel

And God said to him, “Your name is Jacob; no longer shall your name be called Jacob, but Israel shall be your name.” So he called his name Israel.” (Genesis 35:10)

It was time for the multiplying to begin. Israel (Jacob) fathered twelve sons who became the namesakes of twelve tribes. The twelve sons of Israel were: Reuben, Simeon, Levi, Judah, Zebulon, Issachar, Dan, Gad, Asher, Naphtali, Joseph, and Benjamin.

With each new generation, Abraham’s offspring multiplied. New names were added to the story, but the promises (covenant) continued.