Āzar Kayvān (b. between c. 1529 and 1533; d. between c. 1609 and 1618) was the Zoroastrian high priest of Estakhr and a gnostic philosopher, who was a native of Fars in Iran and later emigrated to Patna in Mughal India during the reign of the Emperor Akbar. A member of Sepāsīān community (gorūh), he became the founder of a Zoroastrian school of ishraqiyyun or Illuminationists which exhibited features of Sufi muslim influence. This school became known as the kis-e Abadi (Abadi sect).