1 December (18 November O.S.):
- AMANDUS AND ANSELM, Abbots of Lérins. St. Amandus, the successor of St. Aigulphus (3rd September), reposed in A.D. 708, and St. Anselm circa A.D. 750.
- CONSTANT, a priest-hermit at Lough Erne in Ireland who, in A.D. 777, died under circumstances, details of which are no longer known, which led to his veneration as a martyr.
- KEVERNE, (sixth century), a friend of St. Kieran (5th March) in Cornwall. Some sources maintain they are the same saint.
- MAWES (MAUDETUS, MAUDEZ), (sixth century), a hermit near Falmouth in Cornwall, where a village is named after him. He later went to Brittany where he is known as St. Maudez and where there are many churches are dedicated to him.
- MAXIMUS OF MAINZ, the nineteenth Bishop of Mainz from A.D. 354 until his repose in A.D. 378. St. Maximus suffered great persecution under the Arians.
- MUMMOLUS (MUMBOLUS, MOMLEOLUS, MOMBLE), an Irishman who was a companion of St. Fursey (16th January), whom he succeeded as Abbot of Lagny. St. Mummolus reposed circa A.D. 690.
- NAZARIUS, an Abbot of Lérins who reposed circa A.D. 450.
- ORICULUS AND COMPANIONS, martyrs under the Arian Vandals near Carthage circa A.D. 430.
* - 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."