Saint Rabban Hormizd, or Rabban Hormizd the Persian, (rabban is the Syriac for monk) was a monk of the Nestorian tradition who lived in the seventh century Iraq. He founded the Rabban Hormizd Monastery, named after him, which has been the main monastery of the Church of the East and later of the Chaldean Catholic Church. In the Chaldean Church, Rabban Hormizd is commemorated on the second Sunday after Easter.