Saint Laisrén mac Nad Froích, or Laisrén of Devenish and Lasserian, known as Mo Laisse, was the patron saint of Devenish Island in Lough Erne, near Enniskillen, County Fermanagh, Ireland, in the present diocese of Clogher. Laisrén is the subject of both a Latin and an Irish Life, which offer loose narratives in which a number of miscellaneous anecdotes and miracles have been grouped together.

Saint Máedóc of Ferns, also known as Saint Aidan, Saint Madoc or Saint Mogue, was an Irish saint who was the first Bishop of Ferns in County Wexford and the founder of thirty churches. His birth name was Áed, the name of the Irish god of the underworld, meaning "fire". The name Aidan is a diminutive form of Aed or Aodh, and was also a form of the Latin name Dominus. Máedóc and Mogue are other pet forms of Aed or Aodh, formed from the Irish affectionate prefix mo- and the diminutive suffix -óg, meaning "young", making for something like "my dear little Aodh".