Saint Euthymios of Zela the Ethno-Hieromartyr, (Greek: Ὁ Ἅγιος Εὐθύμιος ὁ Ἱερομάρτυρας Ἐπίσκοπος Ζήλων), born Eustratios Agritellis, 1876–1921, was the last resident Bishop of the Diocese of Zela in Amasya, Western Pontus, which he served from June 12, 1912 until his death on May 29, 1921, during the period of the Greek genocide.