Laisrén mac Feradaig

Laisrén mac Feradaig was the third abbot of the monastery on the island of Iona in Scotland, from about 600 to 605. He is commemorated as a saint in the old Irish calendars.

He belonged to the Cenél Conaill, the kindred of Saint Columba, to whom he was related; his father Feradach was the saint's cousin. In Adomnán's Life of Saint Columba, Laisrén appears among the saint's close companions on a journey through Ardnamurchan, perhaps around 572. Later he was prior of the monastery of Durrow in Ireland, where he oversaw building works.

Adomnán tells that Columba, at Iona, began to weep, because he learned through a vision that Laisrén was wearing out the monks as they raised a large building. Laisrén then stopped the work for the rest of the day, gave the monks a meal, and did the same on later occasions. Columba blessed him and called him "the consoler of the monks".

He succeeded Baíthéne and died in 605, according to the Annals of Ulster. The Martyrology of Tallaght gives his feast on 16 September.