Date unknown, probably c. 304-305.
Julius and Aaron were Roman-Britons who are said to have been put to
death at Caerleon-upon-Usk in Monmouthshire, Britain, perhaps in the
middle of the 3rd century.
Saint Gildas (f.d. January 29)
records that they died under Diocletian,
but it is now believed that Diocletian's decree against
Christians was not enforced in Britain.
Saint Bede (f.d. May 26)
simply
records their illustrious triumph and that
very many others of both
sexes, by unheard of tortures, attained to the crown of heavenly glory.
Another ancient, but not contemporary,
hagiographer relates that Julius and Aaron went to Rome and
there
applied themselves to the sacred studies.
Nothing else is
recorded about them. The date c. 304, during the persecution of
Diocletian, commonly given to these martyrs is only a conjecture (though
a very old one).
Attestation to their cultus can be found in church dedications in and
near Caerleon, and mention in the Book of Llan Dav. Gerald of Wales
writes that their relics were venerated in Caerleon in 1200 AD, and that
each was titular to a church and a monastery; Julius's name belonged to
a convent and Aaron's to an abbey of canons. Their feast is kept in the
diocese of Cardiff
(
Attwater,
Attwater2,
Benedictines,
Farmer,
Husenbeth).