The Ari (The Lion) Z”l (of blessed memory), Ar”i – initials of HaElohi – Rabbi – Its’hak (The divine, Rabbi Isaac), Rabbi Isaac Lurie. Jerusalem 1534- Safed 1572. The greatest Kabbalist of the last 500 years, the father of the Lurianic Kabbalah, the source of the Sephardic Kabbalah, Askenazi & Hassidic Kabbalah.