Orthodox Saints of the Pre-Schism See of Rome
ANATHALON of MILAN, according to Milanese tradition the first Bishop of Milan (north-west Italy) was the Apostle Barnabas (11th June), however, this tradition is of somewhat questionable veracity. There seems to be no historical doubt that St. Anathalon, a disciple of the Apostle Barnabas, did serve as the first Bishop of Milan, and exercised the functions of a bishop at Brescia and other parts of Lombardy (northern Italy). St. Anathalon is said to have reposed at Brescia whilst on an episcopal visitation in 61.
ANDOCHIUS, THYRSUS, and FELIX, Martyrs of Autun, St. Polycarp of Smyrna (23rd February) sent St. Andochius, a priest; and St. Thyrsus, a deacon; from Smyrna (present-day İzmir in Turkey) to Gaul. Landing at Marseille (south-eastern France) , they travelled to Lyons (east-central France), and settled at Autun, Burgundy (east-central France). There they were given lodging and assistance in their endeavours by St. Felix, a wealthy merchant from the East. All three were martyred in 179, and their relics were venerated throughout Gaul.
CHUNIALD and GISLAR, (Seventh Century), natives of Ireland who are said to have assisted St. Rupert of Salzburg (27th March) in his work to enlighten Bavaria (southern Germany) and present-day western Austria.
GERARD SAGREDO (GERARDO SAGREDO, SAGREDO GELLÉRT), an Italian monk from Venice who had a principal role in the conversion of Hungary where he served as the first Bishop of Csanád. When he first arrived in Hungary, St. Gerard served as tutor to St. Emeric of Hungary (4th November) the son of St. Stephen (16th August), King of Hungary (r. 997–1038). Soon St. Gerard went to live as a hermit at Bakonybél Abbey in present-day north-western Hungary. He was elevated to the See of Csanád circa 1030 and served as its Bishop until his martyrdom in 1046.
GEREMARUS (GERMER), a native of Beauvais in the north of modern-day France, who, with the consent of his wife, received monastic tonsure at the Abbey of Pental in present-day Saint-Samson-de-la-Roque in Normandy (north-western France), eventually serving as its Abbot. St. Geremarus resigned his abbacy following a revolt by his monks and went to live as a hermit in a nearby cave. In 655 St. Geremarus founded, and served as first Abbot of, what came to be called the Abbey of Fly (abbaye Saint-Germer-de-Fly), in Picardy (northern France). St. Geremarus reposed circa 658, his relics were initially enshrined at Beauvais Cathedral, but were translated to the Abbey of Saint-Germer-de-Fly in 1132.
RUSTICUS of CLERMONT, eighth Bishop of Clermont in Auvergne (south-central France) from 426 until his repose in 446. Nothing further is known of his life.
YSARN of ST. VICTOR (ISARNUS of TOULOUSE), a native of Toulouse (southern France) who served as an Abbot of the Abbey of Saint Victor (abbaye Saint-Victor de Marseille) in Marseille (south-eastern France), which flourished under his leadership. St. Ysarn was renowned for his care of criminals. He reposed in 1048.
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.