Question: who united the 12 tribes of israel?
Answer: Jacob was renamed Israel when God appeared to him when he was leaving Padn-Aram and blessed him. Jacob produced twelve sons, each of whom became the father of one of the twelve tribes of Israel. Reuven, Shimon, Levi, Yehuda, Issachar, Zevulun, Dan, Naphtali, Gad, Asher, Joseph, Benjamin.