Saint Frumentius (Ge'ez ፍሬምናጦስ frēmnāṭōs) (born at Tyre in the early fourth century, died ca. 383, Ethiopia) was the first Bishop of Aksum (or Axum), and he is credited with bringing Christianity to the Aksumite Kingdom.

He was a Syro-Phoenician Greek born in Tyre. Captured with his brother as a boy, they became slaves to the King of Axum. He freed them before his death, and they were invited to educate his young heir. They also began to teach Christianity. Later Frumentius traveled to Alexandria, Egypt, where he appealed to have a bishop appointed and missionary priests sent to Axum. He was appointed bishop and established the Church in Ethiopia, converting many.