The notation Old Style or (OS) is sometimes used to indicate a date in the Julian Calendar (which is used by churches on the "Old Calendar"). The notation New Style or (NS), indicates a date in the Revised Julian calendar (which is used by churches on the "New Calendar").
"At Tomis, in Scythia, St. Bretannion, bishop, who by his great sanctity, and his zeal for the Catholic faith, shone in the Church, under the Arian emperor Valens, whom he opposed with fortitude."[7]
Born in Wales, churches dedicated to her are to be found in Wales and Cornwall. Her holy well and shrine at Llanddwyn in Anglesey were once centres of pilgrimage.
The first Christian King of East Anglia in England. He introduced Orthodoxy into his kingdom, later himself becoming a monk. He was killed by the pagan King Penda of Mercia and was venerated as a martyr.
Born in Flanders, after a military career he made a pilgrimage to Jerusalem and Rome. On his return he became a monk at St Thierry in Rheims in 1006. Two years later he moved to Saint-Vannes and then to Vaast in Arras. In 1021 he became Abbot of Stavelot-Malmédy in Belgium and the monastic revival soon spread to other monasteries, among others to Hautmont, Marchiennes, St Maximinus of Trier in Germany and St Vaast in Arras in France.
The Roman Martyrology. Transl. by the Archbishop of Baltimore. Last Edition, According to the Copy Printed at Rome in 1914. Revised Edition, with the Imprimatur of His Eminence Cardinal Gibbons. Baltimore: John Murphy Company, 1916. pp.25–26.
The Autonomous Orthodox Metropolia of Western Europe and the Americas (ROCOR). St. Hilarion Calendar of Saints for the year of our Lord 2004. St. Hilarion Press (Austin, TX). p.10.
January 25. Latin Saints of the Orthodox Patriarchate of Rome.
The Roman Martyrology. Transl. by the Archbishop of Baltimore. Last Edition, According to the Copy Printed at Rome in 1914. Revised Edition, with the Imprimatur of His Eminence Cardinal Gibbons. Baltimore: John Murphy Company, 1916. pp.25–26.
(in Greek) Συναξαριστής. 25 Ιανουαρίου. ECCLESIA.GR. (H ΕΚΚΛΗΣΙΑ ΤΗΣ ΕΛΛΑΔΟΣ).
Russian Sources
(in Russian)7 февраля (25 января). Православная Энциклопедия под редакцией Патриарха Московского и всея Руси Кирилла (электронная версия). (Orthodox Encyclopedia - Pravenc.ru).