The twelve tribes of Israel, therefore, collectively carry the name of their father. Jacob had twelve sons with his four wives. With Leah, he had Ruben, Simeon, Levi, Judah, Issachar, and Zebulon.

The concept of birthstones can be traced back to biblical times, particularly to the Breastplate of Aaron, a sacred Jewish garment adorned with twelve stones representing the twelve tribes of Israel.