Orthodox Saints of the Pre-Schism See of Rome
ABUNDIUS, a Sacristan of the Church of Saint Peter in Rome, whose simplicity and holiness of live was written of by St. Gregory the Dialogist (3rd September). St. Abundius reposed circa 564.
DOMNINA and COMPANION, two consecrated virgins who were martyred in 269 along with St. Valentine (14th February).
LAMBERT (LAMBERTUS) of LYON, a high-ranking member of the Court of King Clotaire III (r. 661–673) who left his position at Court to receive monastic tonsure at the Abbey of St. Peter / abbaye de Saint-Pierre (later the Abbey of St. Wandrille / abbaye de Saint-Wandrille de Fontenelle) in Fontenelle, Normandy (France). St. Lambert succeeded St. Wandrille (22nd July) as abbot in 669, serving until his consecration as Archbishop of Lyon (France) in 678, leading his Archdiocese until his repose in 688.
TASSACH, One of St. Patrick’s (17th March) earliest converts and disciples. St. Tassach was a skilled artisan who made croziers, crosses, and shrines for St. Patrick. He served as the first Bishop of Raholp in Co. Down, Ireland. St. Tassach also had the privilege of administering Holy Viaticum to the dying St. Patrick. St. Tassach reposed circa 495.
TIBURTIUS, VALERIAN, and MAXIMUS, third century martyrs in Rome. SS. Tiburtius and Valerian were brothers. All of them were beaten to death.
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.