Another name for our ever-growing list of obscure Irish saints is recorded at June 12 - Saint Tommen mac i Birn. Although the calendars preserve both a patronymic and a place name in connection with Saint Tommen, neither are of any help to Canon O'Hanlon in identifying him:
St. Tommen mac h Birn, Ailithir, Locha uane.
St. Tommen mac h Birn, Ailithir, Locha uane.
At this date, a festival is recorded in the Marytrology of Tallagh, in honour of Tommen mac h Birn i Ailithir, Locha uane. The latter spelling is probably intended for Loch-Uamha, which is situated in West Breifne.