These saints were Britons, and seem to have taken, the one a Roman and the other a Hebrew name at their baptism. They glorified God by martyrdom at Caerleon upon Usk in Monmouthshire, in the persecution of Diocletian, probably about the year 303. Saint Gildas, Saint Bede, and others, speak of their triumph as having been most illustrious. Leland and Bale say, Saints Julius and Aaron had travelled to Rome, and “there applied themselves to the sacred studies.” Bede adds, “very many others of both sexes, by unheard of tortures, attained to the crown of heavenly glory.” Giraldus Cambrensis informs us that their bodies were honoured at Caerleon in the year 1200, when he wrote. Each of these martyrs had a titular church in that city; that of Saint Julius belonged to a nunnery, and that of Saint Aaron to a monastery of canons.
- Father Alban Butler. “Saints Julius and Aaron, Martyrs”. , 1866. CatholicSaints.Info. 28 June 2013. Web. 19 February 2017. <>