Orthodox Saints of the Pre-Schism See of Rome
ANASTASIUS, FELIX, and DIGNA, Martyrs of Córdoba, three more Christians martyred at Córdoba during the reign of Emir Muhammad I of Córdoba (r. 852–886). SS. Anastasius and Felix were monks, and St. Digna a nun, at the double monastery at Tábanos. They were beheaded in 853.
CEARAN (CIARAN) the DEVOUT, St. Cearan was Abbot of Belach-Cluin in Co. Meath, Ireland. He was given the surname “The Devout” because of the holiness of his life. St. Cearan reposed in 870.
DOGMAEL of WALES, St. Dogmael was a monk who evangelised in Pembrokeshire and Anglesey (Ynys Môn) in Wales and later in Brittany (France). He lived at the end of the fifth, and beginning of the sixth century, no further information on his life is extant.
ETHERIUS (AETHERIUS) of VIENNE, a Bishop of Vienne (south-eastern France), who flourished in the early seventh century. Nothing further is known of him.
GEROLD of EVERUX, A courtier at the court of Charlemagne, King of the Franks (r. 768–814). St. Gerold left the world and became a monk at the Abbey of St. Peter / abbaye Saint-Pierre (later the Abbey of St. Wandrille / abbaye Saint-Wandrille) in Fontenelle, Normandy (France). He was consecrated Bishop of Evreux in 787, towards the end of his life, St. Gerold resigned his See and returned to Fontenelle to finish his days as a simple monk. He reposed in 806.
HARTWIG of SALZBURG, consecrated twelfth Archbishop of Salzburg in 991. St. Hartwig served his See until his repose in 1023.
LOTHARIUS of SÉEZ, the founder of a monastery in the forest of Argentan near the River Orne in Normandy (France). Later, he served over three decades as Bishop of Séez in the Tarentaise Valley of south-eastern present-day France. St. Lotharius reposed circa 756, not long after St. Lotharius’ repose, the monastery he founded was re-named Saint-Loyer-des-Champs, in his honour.
MARCIAN of SYRACUSE, (Date Uncertain), according to Sicilian tradition the Apostle Peter (29th June) sent St. Marcian to Sicily to serve as the first Bishop of Syracuse. However, as the most reliable authorities have been unable to place the date of his repose earlier than circa 254, it is much more likely that St. Marcian was a third century bishop sent by the Pope of Rome of the day, who is regarded in the Roman Catholic Church as the successor of the Apostle Peter.
MARK of LUCERA, a fourth century bishop in southern present-day Italy. St. Mark is believed to have reposed circa 328, and was the object of a localised cultus.
NENNUS (NENUS, NEHEMIAS) of ARRAN, a seventh century abbot of monasteries on the Isles of Arran and Bute in Ireland.
PSALMODIUS, an Irish or Scottish disciple of St. Brendan the Voyager (16th May). St. Psalmodius went to Gaul (France) where he lived as a hermit near Limoges until his repose in the late seventh century.
QUINTIAN (QUINCTIAN), (Date Unknown), according to the Roman Martyrology St. Quintian was a Bishop of Rodez in the south of present-day France. However, the opinion of contemporary hagiographic scholars is this an error, as St. Quinctian of Rodez became a Bishop of Auvergne, and is venerated on 13th November. Today’s St. Quintian was most likely a simple priest.
RICHARD of ST. VANNES, in 1004 St. Richard was chosen Abbot of St. Vannes Abbey (abbaye Saint-Vanne de Verdun) in Verdun. St. Richard was nicknamed 'Gratia Dei' ('Thanks be to God'), a phrase he frequently said. He reposed in 1046.
VALERIUS and RUFINUS of SOISSONS, possibly missionaries from Rome, St. Valerius and Rufinus were arrested in Soissons (northern France) circa 287, during the Diocletianic Persecution. In court, they both very publicly proclaimed their faith in Christ resulting in their torture and then martyrdom.
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”.
Details of British Saints excerpted from Orthodox Saints of the British Isles.
Details of continental saints from these sources.
In many cases there are several spelling versions of the names of saints from the British Isles. I use the Oxford Dictionary of National Biography version as the primary version with the more prevalent version in parenthesis e.g. Ceadda (Chad) of Lichfield.