Autonomus was a 3rd-century Italian bishop and hieromartyr who lived during the era of the Diocletianic Persecution. Seeking to avoid the intense religious crackdowns in his homeland, he migrated to Bithynia in Asia Minor. In this new region, he served as the first bishop of Claudiopolis, where he focused his efforts on evangelization. His life and ministry eventually concluded with his martyrdom in 313.