The Lion is the Lion of Judah which goes back to biblical times. Judah - in Hebrew known as Yehudah was the son of Jacob. Jacob gave this symbol to his sons tribe when he refers to his son Judah as a Gur Aryeh גּוּר אַרְיֵה יְהוּדָה, "Young Lion" when he was blessing him. When wearing this necklace you should carry out the blessings of Judah and of the state of Israel.