Abbot of Clonmacnoise
The Abbot of Clonmacnoise was the monastic head of Clonmacnoise. They also bore the title "Comarba of Saint Ciarán", "successor of Saint Ciarán". The following is a list of abbots:
List of abbots to 1539
| Name | Life | Comments | - |
| Ciarán mac int Sair | d. 9 September 544 or 548/9 | - | |
| Óenu moccu Loigse | died 20 January 570 | - | |
| Mac Nisse | died 13 June 585 or 591 | The Annals of Ulster hesitate, suggesting both 585 and 591 as possible dates. Both the Annals of the Four Masters and the Annals of Clonmacnoise say that he was abbot for 16 years. | - |
| Ailithir | died 599 | - | |
| To Lua Foto | died 614 | - | |
| Columbán moccu Bairddéni | died 628 | - | |
| Crónán moccu Loigde | died 18 July 638 | - | |
| Áedlug mac Cammáin | died 26 February 652 | - | |
| Báetán moccu Chormaic | died 1 March 664 | - | |
| Colmán Cass mac Fualascaig | died 665 | - | |
| Cumméne | died 665 | - | |
| Colmán | died 683 | - | |
| Forcrón | died 686 | - | |
| Crónán Becc | died 6 April 694 | - | |
| Osséne Frémainne mac Galluist, | deposed before 696/7, died 706 | - | |
| Faílbe Becc | died 713 | - | |
| Cuindles | died 724 | - | |
| Fland Fine ua Colla | died 733 | - | |
| Conmáel ua Lóchéni | died 737 | - | |
| Cellach mac Ségdai | died 740 | - | |
| Commán mac Fáelchon | died 26 December 747 | - | |
| Luccreth | died 29 April 753 | - | |
| Cormac ua Cairbre Crom | died 762 | - | |
| Rónán | died 764 | - | |
| Ua Miannaig | died 768 | - | |
| Folachtach | died 770 | - | |
| Forbassach ua Cernaig | died 771 | - | |
| Collbran | died 776 | - | |
| Rechtnia | died 784 | - | |
| Snéidriagail | died 786 | - | |
| Murgal | died 789 | - | |
| Sóerbergg | died 791 | - | |
| Ioseph ua Cernaig | died 794 | - | |
| Anaile | died 799 | - | |
| Tuathgal | died 811 | - | |
| Foirchellach Fobair | died 814 | - | |
| Suibne mac Cuanach | died 816 | - | |
| Rónán | resigned 823, died 844 | - | |
| Cétadach | died 848 | - | |
| Condmach | died 868 | - | |
| Martan of Clonmacnoise | died 869 | - | |
| Ferdomnach of Clonmacnoise | died 872 | - | |
| Eógan Topair | died 876 | - | |
| Máel Tuili ua Cuanach | died 877 | - | |
| Máel Pátraic | died 885 | - | |
| Máel Brigte na Gamnaide | died 892 | The Annals of Inisfallen read sub anno 891 read "Mael Petair mac Cúán, took Cluain Ferta Brénainn", and in 895 "Repose of Mael Petair mac Cúán, abbot of Tír dá Glas and Cluain Ferta Brénainn." | - |
| Blathmac mac Tairchedaig | died 896 | The Annals of Inisfallen sub anno 896 read "The martyrdom of Mael Achid, abbot of Cluain Moccu Nois." Perhaps he replaced Blathmac only to be subsequently killed in a raid on the monastery. | - |
| Dedimus ua Foirbthen | deposed 901, died 923 | - | |
| Ioseph of Lough Con | died 904 | - | |
| Aed mac Ailill | died 916 | - | |
| Colmán mac Ailella | died 926 | In 922, "Tomrair son of Elgi, a Jarl of the foreigners, on Luimnech, and he proceeded and plundered Inis Celtra and Muicinis, and burned Cluain Moccu Nóis; and he went on Loch Rí and plundered all its islands, and he ravaged Mide." | - |
| Máel Giric | died 929 | - | |
| Tipraite mac Ainnséine | died 931 | - | |
| Ainmere ua Cathla | 948 | - | |
| Ferdomnach ua Máenaig | died 952 | The Annals of Inisfallen state, sub anno 951, that "A foray by Cellachán and by Donnchadh, and they plundered Cluain Ferta Brénainn and Cluain Moccu Nóis." | - |
| Célechair mac Robartaig | died 954 | Inisfallen says that he was also abbot of Cluain Iraird. | - |
| Cormac ua Cillín | died 966 | - | |
| Tuathal | died 971 | Inisfallen gives his obit under 972. | - |
| Dúnchad ua Bráein | resigned 976, died 16 January, 988/9 | - | |
| Máel Finnia mac Speláin | died 992 | - | |
| Ua Beculáin | deposed 1002 | - | |
| Flannchad ua Ruaidíne | died 1003 | - | |
| Flaithbertach mac Domnaill | died 1014 | Inisfallen states that Robartach the Anchorite, rested in Cluain Moccu Nois in 1007, during Flaithbertach's term. | - |
| Muiredach mac Mugróin | died 1025 | - | |
| Bressal Conailech | died 1030 | - | |
| Loingsech ua Flaithnén | 1042 | - | |
| Echtigern Ua hEaghráin | died 1052 | - | |
| Máel Finnéin mac Cuinn na mBocht | died 1056 | - | |
| Ailill Ua hAirechtaig | died 1070 | - | |
| Máel Ciaráin mac Cuinn na mBocht | died 1079 | - | |
| Tigernach Ua Bráein | died 1088 | once held to be the author of the Annals of Tigernach, but possibly one of the annalists responsible for the text; was also abbot of Roscommon. | |
| Ailill Ua Nialláin | died 1093 | - | |
| Mac Raith Ua Flaithnén | resigned 1096, died 1100 | - | |
| Cormac mac Cuinn na mBocht | died 1103 | - | |
| Flaithbertach Ua Loingsig | died 1109 | - | |
| Gilla Críst Ua Máel Eóin | died 1127 | - | |
| Domnall Ua Dubthaig | died 17 March 1136 | - | |
| Máel Mochta Ua Fidabra | died 1173 | - | |
| Áed Ua Máel Eóin | died 1153 | - | |
| Tigernach Ua Máel Eóin | died 1172 | - | |
| Máel Ciaráin Ua Fidabra | died 1181 | - | |
| Máel Muire Ua Máel Eóin | died 1230 | - | |
| Máel Ciaráin Ó Máel Eóin | died 1263 | - | |
| Tomás | fl. 1268 | - | |
| Pol mac Teige Mac Teithechán | died 1384 | - | |
| Niall Ó Sheridan | fl. 14th century | - | |
| Cahir Mac Cochláin | died 1539. | - |