Abuna Aregawi was a sixth-century Syrian monk who became one of the Nine Saints. Following the Council of Chalcedon, he fled religious persecution within the Roman Empire to seek refuge in Ethiopia. As a disciple of Pachomius the Great, he played a vital role in introducing monastic traditions to the region. He served under King Ella Amida and later provided counsel to King Kaleb, significantly influencing the early development of Christianity in East Africa.