Orthodox Saints of the Pre-Schism See of Rome
FIONNCHU, (Sixth Century), the successor of St. Comgall (10th May) as Abbot of Bangor Abbey, Co. Down, Ireland. Nothing further is known of his life.
HIPPOLYTUS, an Abbot-Bishop of Saint-Claude in the Jura mountains of present-day France, who reposed circa 775. No further details of his life are known.
PAPINIANUS and MANSUETUS, (Fifth Century), two bishops who were amongst the numerous orthodox Christians in North Africa martyred under the Arian Gaiseric, King of the Vandals (r. 428 - 477). It is believed SS. Papinianus and Mansuetus were burnt to death.
RUFUS and COMPANIONS, A Roman who, along with his entire household, was martyred during the Diocletianic Persecution (303–313).
VALERIAN, URBAN, CRESCENS, EUSTACE, CRESCONIUS, CRESCENTIAN, FELIX, HORTULANUS, and FLORENTIAN, (Fifth Century), North African bishops who were exiled by the the Arian Gaiseric, King of the Vandals (r. 428 - 477). Reposing in exile they were subsequently commemorated as Hiero-confessors.
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”.
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.