Orthodox Saints of the Pre-Schism See of Rome
CLINIUS, (Date Unknown), a Greek monk at the Abbey of Monte Cassino, and later Abbot of St. Peter's near Pontecorvo in Lazio, Italy.
FERGUS, (Sixth Century), he was a Bishop of Downpatrick in Co. Down in Ireland. Though he has always been held in great veneration, the details of his life are uncertain, and it is even possible that he was the same man as St. Fergus of Scotland (27th November), who flourished in the eighth century
IRENE of ROME, the widow of St. Castulus of Rome (26th March). St. Irene went to collect St. Sebastian's (20th January) body for burial, and found that he was still, barely, alive and brought him back to her home where she nursed him back to health. St. Irene also tried, unsuccessfully, to talk St. Sebastian into leaving Rome.
MAMERTINUS, a monk, and later Abbot of the Monastery of SS. Cosmas and Damian in Auxerre, in present-day Burgundy, France. St. Mamertinus reposed circa 462.
OSBURGH (OSBURGA), (Eleventh Century), an Abbess, and according to some sources the first of the convent founded at Coventry by King Cnut. There are no particulars about her extant.
PASTOR, reputed to have been Bishop of Orléans at some point in the sixth century. Though St. Pastor is listed in the old martyrologies, he does not appear on any lists of hierarchs of the See.
PATTO (PACIFICUS), believed to have a native of Ireland, St. Patto went to Saxony where he became abbot of a monastery, and later was consecrated Bishop of Werden in present-day Werden-Essen, Germany. St. Patto reposed circa 788.
QUIRINUS, the Roman administrator of the prison in which Pope St. Alexander I (3rd May) was confined. St. Alexander converted him and his daughter St. Balbina (31st March). However, shortly afterwards St. Quirinus was arrested, tortured, and beheaded circa 117, during the reign of Emperor Hadrian (r. 117–138).
REGULUS (RIEUL), the first Bishop of Civitas Silvanectium, Gaul (present-day Senlis, France). St. Regulus reposed circa 260.
TOLA, little is known about this saint, other than that he was originally a hermit at Tola, Co. Meath, Ireland. St. Tola built a monastery for his many disciples, and eventually was consecrated Bishop of Clonard. He is believed to have reposed circa 733.
ZOSIMUS, he entered the monastery of Santa Lucia near Syracuse in Sicily at the age of seven, and thirty years later St. Zosimus was made Abbot. Roughly two decades later he was consecrated Bishop of Syracuse. St. Zosimus reposed circa 660 at the age of ninety.
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.