He was born in the country of Hy-Conalls in Ireland, in the latter part of the fifth century, was a disciple of the abbots Cassidus and Natal, or Naal: then travelled for spiritual improvement to Rome, and thence into Britain. In this kingdom he contracted a close friendship with Saint David. After his return he founded many churches in Ireland, and a great monastery in Inis-Cathaig, an island lying at the mouth of the river Shannon, which he governed, and in which he continued to reside after he was advanced to the episcopal dignity. The abbots, his successors for several centuries, were all bishops, till this great diocese was divided into three, namely of Limerick, Killaloe, and Ardfert. Saint Senan died on the same day and year with Saint David; but was honoured in the Irish church on the 8th of March. A town in Cornwall bears the name of Saint Senan.
- Father Alban Butler. “Saint Senan, Bishop and Confessor”. , 1866. CatholicSaints.Info. 7 March 2013. Web. 28 August 2015. <>