Saints Aaron and Julius (or Julian, ) were two British saints who are traditionally held to have been martyred at Caerleon, Wales, during the Diocletianic Persecution of Christians in 304 AD Along with Saint Alban and Amphibalus, they are the only named martyrs from Roman Britain. Their feast day was traditionally celebrated on 1 July but is now observed together with Saint Alban on 20 June by both the Eastern Orthodox, Roman Catholic, and Anglican Churches.