Mo Chutu of Lismore

Saint Mo Chutu mac Fínaill (died 14 May 639), also known as Carthach or Carthach the Younger (a name Latinized as Carthagus and Anglicized as Carthage), was abbot of Rahan, County Offaly and subsequently, founder and first abbot of Lismore (Irish Les Mór Mo Chutu), County Waterford. The saint's Life has come down in several Irish and Latin recensions, which appear to derive from a Latin original written in the 11th or 12th century.

Through his father, Fínall Fíngein, Mo Chutu belonged to the Ciarraige Luachra, while his mother, Finmed, was of the Corco Duibne. Notes added to the Félire Óengusso (the Martyrology of Óengus) claim that his fosterfather was Carthach mac Fianáin, that is Carthach the Elder, whose period of activity can be assigned to the late 6th century.

Mo Chutu first became abbot of Rahan, a monastery which lay in the territory of the southern Uí Néill. He composed a rule for his monks, an Irish metrical poem of 580 lines, divided into nine separate sections, a notable literary relic of the early Irish Church.