Diarmaid the Just

Saint Diarmaid the Just (also known as Diermit, Dhiarmuit, Dermod, Diermedus, Diermetus, Diermitius, Diermitius) was a Catholic abbot of Inis Clothrann (Inchcleraun), Lough Ree, County Longford and of Faughalstown, County Westmeath and a famous Irish confessor of the late-sixth century.

He was of princely origin as he was seventh in descent from Nath Í, King of Ireland, who died 428 and a member of the Hy-Fiachrach family from Connacht. His father was Lugna, son of Lugad, son of Finbarr, son of Fraic, son of Cathchuon, son of Aengus Becchuoun, son of Nath Í son of Fiachrae son of Eochaid Mugmedon. His mother was Dediva (also called Editua or Dedi or Deidi or Deighe or Deidiu or Deaga or Mediva), daughter of Tren, son of Dubhthach moccu Lughair, who was a Chief Ollam of Ireland and royal poet of King Lóegaire mac Néill. Dediva's other children were Saint Senan of Laraghabrine, son of Fintan, Saint Caillin of Fenagh, son of Niata, St.Mainchín of Corann, son of Collan of Corann, Saint Felim of Kilmore son of Carill, Saint Daigh of Inniskeen son of Carill, Saint Femia daughter of Carill and Senchán Torpéist, a later Chief Ollam of Ireland. Saint Diarmaid was the youngest of Dediva's famous children.

About the year 530, he founded the great monastery of Inchcleraun on Lough Ree, in the Diocese of Ardagh. Wishing to found an oratory far from the day-to-day distractions of civilization, he selected the isolated island associated with the memory of Queen Medbh, Inchcleraun.

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