Jacob, through his two wives and his two concubines had 12 biological sons; Reuben (Genesis 29:32), Simeon (Genesis 29:33), Levi (Genesis 29:34), Judah (Genesis 29:35), Dan (Genesis 30:5), Naphtali (Genesis 30:7), Gad (Genesis 30:10), Asher (Genesis 30:12), Issachar (Genesis 30:17), Zebulun (Genesis 30:19), Joseph ( .figure out