5 December (22 November O.S.):
- CECILIA, One of Rome's most famous virgin-martyrs. She was buried in the cemetery of St Callistus, later her relics were translated to beneath the altar of the basilica of St. Cecilia in Trastevere. She is the patron-saint of musicians.
- CHRISTIAN, the thirty-seventh Bishop of Auxerre. He reposed circa 873.
- DEYNIOLEN (DEINIOL, DANIEL), an abbot of Bangor in Wales; he is more commonly known as St Deiniol the Younger and reposed in 621.
- MAURUS, born to Christian parents in North Africa, he went to Rome where he was martyred under Numerian.
- PRAGMATIUS, a bishop of Autun who reposed circa 520.
- SABINIAN, the third Abbot of Moutier-Saint-Chaffre, he reposed circa 720?.
- TIGRIDIA (OR TRIGIDIA), a daughter of Count Sancho Garcia who founded for her the convent of Oña, near Burgos in present-day Spain. She reposed circa 925.
* - Prior to the Schism the Patriarchate of Rome was Orthodox and fully in communion with the Orthodox Church. As Saint John of Shanghai and San Francisco +1966 said "The West was Orthodox for a thousand years, and her venerable Liturgy is far older than any of her heresies."