Flannán mac Toirrdelbaig was an Irish saint who lived in the 7th century and was the son of an Irish chieftain, Toirdhealbhach of Dál gCais. He entered Mo Lua's monastery at Killaloe, where it is believed he became an Abbot. He is remembered as a great preacher.
- Roman Catholic Diocese of Killaloe
- Diocese of Limerick and Killaloe (Church of Ireland)
- St. Flannan's College
- "Saint Flannan". Library Ireland. Retrieved 9 August 2020.