Kolman Muillin
Feast: 1 January (not on the universal Roman calendar; kept in the Roman Martyrology or local calendars)
Who they were
An Irish saint of the fifth or sixth century, Colman Muilinn of Derrykeighan may have belonged to the ancient church of Derry. His name, meaning "dove," is extremely common among Irish saints. The Martyrology of Tallaght records him as being from Derrykeighan in County Antrim, while the Martyrology of Donegal places him among the Dál Riata in Ulster and names his mother as Buan.
Almost nothing else is known of him; tradition holds that he lived at a mill and there paid honour to his brethren, reflected in his epithet "Muilinn" (of the mill). His feast is kept on 31 January.
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
Early Irish saint linked in tradition to Derrykeighan, County Antrim, and to a mill; feast kept 31 January.
- Santi, beati e testimoni (santiebeati.it) - San Colman Muilinn di Derrykeighan, by Mauro Bonato
- Wikidata Q21995030 — dates, feast day and identifiers (CC0)
Checked against the sources listed on 22 September 2026. Corrections welcome.