8 Irish abbots

The Abbot of Glendalough was the head of the monastery at Glendalough, founded by Saint Kevin in the early sixth century, which is in modern-day County Wicklow, Ireland. After the death of Saint Kevin, the abbots bore the title "Comarbai Cóemgein". Until the early twelfth century, a number of abbots and others at the monastery of Glendalough had also been consecrated bishops, but this did not necessarily mean they were bishops of Glendalough, since the Diocese of Glendalough was not established until the Synod of Rathbreasail in 1111.

Saint Budoc of Dol was a Bishop of Dol, venerated after his death as a saint in both Brittany and Devon. Saint Budoc is the patron of Plourin Ploudalmezeau in Finistère where his relics are preserved. His feast day was celebrated on 8 December, the date still used in Devon, but in Brittany this was moved to 9 December.

Cumianus was an Irish monk who became abbot of San Colombano di Bobbio around 715. He left Ireland as an old man. The intricately carved lid of his sarcophagus, containing a lengthy epitaph, was made by one Master John and commissioned by King Liutprand.

Declán of Ardmore, also called Déclán, was an early Irish saint of the Déisi Muman, who was remembered for having converted the Déisi in the late 5th century and for having founded the monastery of Ardmore in what is now Co. Waterford. The principal source for his life and cult is a Latin Life of the 12th century. Like Ailbe of Emly, Ciarán of Saigir and Abbán of Moyarney, Declán is presented as a Munster saint who preceded Saint Patrick in bringing Christianity to Ireland. He was regarded as a patron saint of the Déisi of East Munster.

Saint Máel Ruain was founder and abbot-bishop of the monastery of Tallaght. He is often considered to be a leading figure of the monastic 'movement' that has become known to scholarship as the Céli Dé. He is not to be confused with the later namesake Máel Ruain, bishop of Lusca.

Saint Mo Chutu mac Fínaill, also known as Mochuda, Carthach or Carthach the Younger, was abbot of Rahan, County Offaly and subsequently, founder and first abbot of Lismore, 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.

Saint Piran or Pyran, died c. 480, was a 5th-century Cornish abbot and saint, of Irish origin. He is the patron saint of tin-miners, and is also generally regarded as the patron saint of Cornwall, although Saint Michael and Saint Petroc also have some claim to this title.

Áed Ua Crimthainn, also called Áed mac Crimthainn, was abbot and coarb of Terryglass, near Lough Derg in County Tipperary, Ireland. He was the principal scribe of the Book of Leinster, the Book of Oughaval, an important Middle Irish medieval illuminated manuscript, and is also believed to have been its sole compiler.