Seanán the Grey
Irish saint and brother of Saint Lachtain
Feast: 8 March (not on the universal Roman calendar; kept in the Roman Martyrology or local calendars)
Who they were
Senán was an Irish abbot of the sixth century, venerated as one of the Twelve Apostles of Ireland. Born in 488, he studied in various Irish monasteries before founding the monastery of Inis Cathaig (Scattery Island), which he led as abbot with wisdom and compassion, drawing monks from across Ireland.
His life is full of miracles and legend: he is said to have driven out a demon, to have crossed the sea on a stone, and even to have converted a wild boar. He died in 544, and his feast is kept on 8 March.
The miracles
There was never a formal cause: he has been honoured as a saint since before the Church's formal processes began.
Why that counted as sanctity
Irish abbot, one of the Twelve Apostles of Ireland and founder of the monastery of Inis Cathaig; feast 8 March.
Connected on this site
- Lachtín mac Tarbín Saint Brother or sister
- Santi, beati e testimoni (santiebeati.it) - San Senano, by Franco Dieghi
- Wikidata Q130554329 — dates, feast day and identifiers (CC0)
Checked against the sources listed on 22 September 2026. Corrections welcome.