Orthodox Saints of the Pre-Schism See of Rome
FAUSTINUS, consecrated Bishop of Brescia circa 360, succeeding St. Ursicinus (1st December). St. Faustinus wrote the Acts of SS. Faustinus and Jovita (15th February), whom, according to legend, he was related to. He reposed in 381 and was succeeded by St. Philastrius (18th July).
HONESTUS, following his baptism and ordination to the priesthood by St. Saturninus (29th November), St. Honestus joined St. Saturninus on his mission to evangelise Navarre. His work was quite fruitful but ended circa 270 with martyrdom at Pamplona.
ONESIMUS, the slave who ran away from his master Philemon, was converted by St. Paul (29th June) in Rome, and was the reason for the Apostle's letter to Philemon. Tradition says St. Onesimus was shortly thereafter consecrated Bishop of Ephesus succeeding St. Timothy. There is some debate as to the length of his Episcopate, but all agree that St. Onesimus was martyred in Rome towards the end of the first century.
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.