Orthodox Saints of the Pre-Schism See of Rome
BEUNO, it is almost impossible to disentangle any certain history from the many legends and superstitions about St. Beuno. However, he is regarded as one of, if not, the most important saint in the evangelisation of north Wales. It seems he was educated at St. Deiniol's Monastery at Bangor in present-day Gwynedd, northwest Wales. St. Beuno then founded monasteries at Llanfeuno (Llanveynoe) in Herefordshire (west Midlands, England), though his chief mission work seems to have been in Northern Wales, and Llanymynech on the Powys / Shropshire border. St. Beuno reposed circa 640, and buried at Clynnog Fawr (Gwynedd, north-west Wales), where his tomb has been long venerated.
CYPRIAN, a Bishop of Brescia in Lombardy (Italy) who reposed in 582. St. Cyprian’s relics were later enshrined in the church of San Pietro in Oliveto, Brescia.
FRODULPHUS (FROU), a disciple of St. Medericus (29th August) who received monastic tonsure at the Abbey of St. Martin of Autun (abbaye Saint-Martin d'Autun) in Autun (Saône-et-Loire, France). Forced to flee by the invading Saracens, St. Frodulphus settled in Barjon about 100 km / 60 mi to the north-east. He reposed circa 750.
MAELRUBIUS (MAOLRUBHA), St. Maelrubius was a monk at St. Comgall’s (10th May) monastery at Bangor (Bennchor) in Co. Down, Ireland. Feeling a missionary calling, St. Maelrubius went to Iona, and then to work enlightening the north-west coast of Scotland, founding a church at Applecross. According to some accounts St. Maelrubius lived to an advanced age, and may have been martyred by the Danes circa 720.
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”.
Details of British Saints excerpted from Orthodox Saints of the British Isles.
Details of continental saints from these sources.
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.