The feast of St. George is found in the Ethiopian, Coptic, Syriac and Latin liturgies. The ancient “Georgia” is named after him. He is renowned as the armed defender of the Church, one who carried the trophies of victory over the enemy. The Emperor Diocletian has at first favored this illustrious son of a noble family of Cappadocia, but when St. George reproached the Emperor with his cruelty to Christians, he was cast into prison and put to death with such cruelty that in the Eastern Liturgy he is styled the “Great Martyr.” England chose him for her patron in 800.
(Source: Fr. Lasance, The New Roman Missal)