Orthodox Saints of the Pre-Schism See of Rome
ANASTASIUS (ASTRIK) of ESZTERGOM, first Abbot of the Abbey of St. Martin in Pannonhalma in Hungary from 996 until 1006. St. Anastasius then served as the first Archbishop and Primate of Hungary. He also served as St. Stephen (16th August), King of Hungary's (r. 1000–1038) ambassador to Pope Sylvester II (r. 999–1003). St. Anastasius reposed circa 1035.
EBERHARD (EVERARD) of EINSIEDELN, a Swabian monk who was the founder and first Abbot of the Abbey of Our Lady of the Hermits (abtei Maria Himmelfahrt und St. Mauritius) in Einsiedeln, Switzerland. St. Eberhard reposed 958.
EUSEBIUS of ROME, a priest in Rome about whom there is no reliable information extant. St. Eusebius is said to be the founder of the church on the Esquiline Hill in Rome that bears his name, and it is believed that he reposed circa 357.
FACHANAN of ROSS, St. Fachanan is believed to have been the founder of the monastic school of Ross, at what is now Rosscarbery, Co. Cork, Ireland. This school, one of the most famous in Ireland, flourished for three hundred years, surviving in some form until the Norman invasions. The diocese of Ross grew around St. Fachanan’s monastic establishment and he served as its first Bishop. He reposed in the late sixth century.
WERENFRID, an Englishman who assisted St. Willibrord of Echternach (7th November) in his mission to the people of Frisia (present-day Netherlands). St. Werenfrid reposed in 780, and was buried at Arnhem (eastern Netherlands). His tomb became well known for miraculous cures.
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.