Clan Diarmatta (Clandermot), of the Cenél Éoghain, descent from Clan Conchobhair. The parish of Clondermot in County Derry is said to derive its name from this clan territory. An O'Carolan sept (O Cairealláin) as well as a Mac Ettigan (Mac Eitigen) were cited as chiefs of Clan Diarmada prior to the 13th century. Not to be confused with Uí Diarmata of Síl Muiredaig, in Connacht. Conmacine, Enda, Ross
An early Clan Diarmatta (Clan Conchobuir) genealogy: (Rawlinson) Máel Ruanaid m. Áeda m. Ruaidrí m. Óengusa m. Cairelláin m. Baígill m. Diarmata m. Conchobuir m. Fergaile m. Máele Dúin m. Máel Fithrich m. Áeda Uaridnaich m. Domnaill m. Muircherdaich m. Muiredaich m. Éogain m. Néill Noígiallaig.
Delbna - (or Delvin) Co. Roscommon and Co. Galway. Dealbhna Nuadhat was a territory between the rivers Suck and Shannon. They are sometimes referred to as the Dealbhna of Uí Máine. O'Flanagan was seated between Mantua and Elphin in Co. Roscommon.
- U1090, Mael Ruanaid ua Cairellán, chief of Clann Diarmata, Gilla Críst ua Luinig, chief of Cenél Maién, were treacherously killed on the same day by Domnall ua Lochlainn.
- LC1117, Conchobhar Ua Cairellain was slain by the Feara-Manach.
- CS1132, Diarmait grandson of Eitigén, chief of Clann Diarmata, dies.
- LC1135, 17] Ruaidhri O'Canannain, king of Cenel-Conaill, a war-like, defensive man, of charity and humanity, was slain by the men of Magh-Itha, viz., by Maelruanaidh O'Cairellan, and by Clann-Diarmada.
- LC1138, Maelruanaidh Ua Cairellain, kindling lamp of the north of Erinn as regards figure, understanding, and valour, was slain by the Cenel-Moain.
- LC1177, Conchobhar O'Cairellain, indeed, gained a victory over O'Maeldoraidh and the Cenel-Conaill, in which a great number of the Cenel-Enna were slain, along with the son of O'Serrigh, and many other chieftains likewise.
- LC1177, Conchobhar O'Cairellain, i.e. the chief of Clann-Diarmada, was slain ... by the forces of by John de Curci.
- LC1179, Peace was made by Donnchadh O'Cairellain, and by all the Clann-Diarmada, with the Cenel-Moain, and with O'Gairmleghaigh, i.e. with Amhlaibh, grandson of Maen, i.e. the brother of the wife of Donnchadh O'Cairellain, ...
- LC1180, Raghnall O'Cairellain was slain by the Cenel-Moain. Donnchadh O'Cairellain was killed by the Cenel-Conaill.
- U1197, Ma[c] Craith Ua [F]laithbertaigh, son of the king of Tir Eogain, was killed and Maelruanaigh O Fercomais (or O'Cairellain), arch-chief of Clann-Diarmata, was killed and two good horsemen of his people were killed.
- U1207, A treacherous foray by the Cenel-Conaill into Uí -Fhearannain and into Clann-Diarmata, so that they seized cows and killed people. The Clann-Diarmata and the Uí -[Fh]airennain and the Uí -Gailmredhaigh overtook them, so that a countless number of them were slain and a multitude were drowned.
- M1215, Teige Mac Etigen, Chief of Clann-Dermot, died.
- U1216, Oenghus Ua Cairrellain, chief of Clann-Diarmata, was killed by his own kinsmen.
MacConry (King) of Moycullen are cited as chiefs of Dealbhna Thíre Dá Locha (of the Two Lakes), though not located in Uí Maine.
There were also Delbna territories in Westmeath and Meath, i.e. Delbna Mor, Delbna Bec and Delbna bEthra.
- For 751, The battle of Bealach Cro was gained by Crimhthann over the Dealbhna of Uí Máine, in which was slain Finn, son of Arbh, Lord of Dealbhna, at Tibra Finn, and the Dealbhna were slaughtered about him. From this are named Lochan Bealaigh Cro, and Tibra Finn. The Uí Máine were contending with them for the cantred between the Suca the River Suck and the Sinainn the River Shannon, for this was called the cantred of Dealbhna.
- For 751/759, The shipwreck of the Dealbhna Nuadhat on Loch Ribh, with their lord, Diumasach. Thrice nine vessels and three, of the Gamhanraighe of Loch Ribh.
- For 816, The battle of Rath Fhearadh by the chieftains of Uí Briuin, Diarmaid, son of Tomaltach, and Maelcothaigh, son of Fogartach, against the lord of Uí Máine, Cathal, son of Murchadh, in Dealbhna Nuadhat, between the Suca and the Sinnainn, where Cathal and many other nobles along with him were slain.
- M1048, A predatory excursion was made by the royal heirs or chieftains of Uí -Maine into Dealbhna, where the royal chieftains were all slain, namely, Ua Maelruanaidh, Ua Flannagain, the Cleireach Ua Taidhg, and Mac Buadhachain, royal heir of Dealbhna Nuadhat.
- For 1142, Mac Meic Con Roí, tigherna Dealbhna Thíre Dá Locha, was slain.
Clann Connmaigh and Clann Murchadha - O Fínnachta (O'Finaghty) were chiefs of Clan Connmaigh and of Clan Murchada, districts in the two half baronies of Ballymoe in the Uí Maine counties of Galway and Roscommon. Clanconow, alias Clanconway, is described by O'Donovan as west of the river, a branch of the O Finaghtys. Hennessy gives Clann Murchadha on the east of the river Suck. O'Finaghty of Clan Conway, had their castle at Dunamon (Caislén Dúin Imgáin), near the river Suck, in the county Roscommon. O'Dugan makes note of their two chiefs in the Poems, and cites Finaghty of "Clan Murrogh of the Champions;" and Finaghty of the "Clan Conway." The O'Finaghtys were noted by O'Hart as a branch of Clan Colla, as were the Uí Maine. The historian O'Dononvan notes the Ó Fionachta (O'Finaghty) were of the same stock as the O'Connors of Síl Murray, who at one time were senior to them. Dr. A. Moore states that there was also an Uí Maine sept of O'Finaghty. The Annals of Tigernach give Clann Conmaig as a sub-division of Síl Muiredaig, the territory giving tribute to the kings of Connacht. The Mac Davey Burkes were later lords of Clanconway.
An early genealogy of Clann Murchadha: Finachta m. Guillbeithi m. Flaind m. Cinaith m. Muiredaigh m. Finachta m. Gletnecan m. Fergusa m. Murcada m. Innrachtaigh m. Muiredaigh. also... Murchadh m. Flainn m. Gletnechan m. Congalaigh m. Fergusa m. Murcada m. Innrachtaigh m. Muiredaigh
- For 953, Flann, mac Glethnecháin, toisech Cloinne Murchadha, died.
- For 971, Murchadh, mac Floinn, mic Glethneacháin, taoiseach Cloinne Murchadha.
- M1135, Maelisa Ua Finnachta, comharba of Ros-Commain, died.
- M1140, Muiredhach, mac mic Muireadhaigh Uí Fhionnachta, toiseach Cloinne Murchadha.
- U1184, Flann Ua Finnachta, chief of Clann-Murchadha, dies.
- LC1188, Flaithbhertach, son of Sitric O'Finnachta, occisi sunt.
- M1189, Conor Moinmoy (the son of Roderic), king of all Connaught, both English and Irish, was killed by a party of his own people and tribes; i.e. by Manus, the son of Flann O'Finaghty (usually called an Crossach Donn), and others.
- M1225, Teige O'Finaghty, one of the officers Aes graidh of Hugh, the son of Roderic [O Conchobair], was slain by the people of Mac Egan...
- C1225, Muiredach O Finnachta, chieftain of Clann Murthaile, died in a boat on Loch Corrib, though in good health when he entered it.
- C1289, Simon O Finnachta, Archdeacon of Elphin, [rested].
- 1309, Macwilliam [Burke] crossed the Curlieus northwards and ejected the son of Cathal from his stronghold. The vanguard of Macwilliam's army killed Donnchad O Finnachta and others not enumerated here.
- C1354, Seaan O Finnachta, bishop of Elphin, rested in Christ.
- M1413, O Flainn, chieftain of Tellach Curnan, was killed by the son of Muirchertach O Flainn and some of the Clanconway this year.
- M1424, Richard Mac David Burke, lord of Clanconway, died and was buried at Roscommon.
- M1475, Eogan Caech O Conchobair utterly defeated the Clanconway in a night-engagement, wherein more than two score were killed, including two sons of Hubert son of William Mac Davy [Burke] and two sons of Tadc O Cellaig.
Located in the County Sligo, the baronies of Tirerril and part of Corran. Named for Ailill, son of Eochuid Mugmedón, and brother of Niall of the Nine Hostages, a quo Úi Ailella Connacht. The MacDonagh sept, branch of the great MacDermot clan, were later lords of Corran or Tirerrill. The Mulrooney and later MacDermot septs, princes of Moylurg, were overlords in this territory.
- For 1124, Maol Sechlainn mac Taidhg, mic Maol Ruanaidh, tigherna Maighe Luirg.
- For 1159, Diarmaid, mac Taidhg Uí Mhaoil Ruanaidh, tigherna Mhaighe Luircc.
- For 1159, Ghiolla Chriost, mac Taidhg Uí Mhaoil Ruanaidh, tigherna Muighe Luirg.
- For 1187, Muirghíus, mac Taidhg h-Ui Mhail Ruainigh, ri Mhuighe Luirg.
- For 1322, Maelruanaid mac Gilla Crist meic Conchobair meic Cormaic meic Tomaltaig na Carci Meic Diarmata, ri Mugi Luirg (Moylurg), died.
- For 1322, Maelruanaid Mac Diarmata ri Moigi Luirc (Moylurg).
Located in southwest County Leitrim in the area of Magh Nise (Moynish). i.e about the baronies of Mohill and Leitrim. The O Maoilmiadhaigh (O'Mulvey) sept is noted as chiefs here, and over Muintir Eolais for a time. Muintir Cearbhallain - Tellach Cerbhalláin
- M1179, Melaghlin O'Mulvey, Chief of Muintir-Eolais, died.
- M1315, O'Mulvey, Chief of Muintir-Cearbhallain, and many of their people, were slain by Mulrony Mac Dermot, Lord of Moylurg.
- LC1355, Diarmaid O'Maelmiadhaigh, chieftain of Muinter-Cerbhallain, was killed by Muinter-Birn, and a great number of the Muinter-Eolais along with him.
- M1378, Farrell O'Mulvey, Chief of Muintir-Carolan, died.
- LC1528.11, O'Maelmhiadhaigh, i.e. Cathal, son of Domhnall, son of Uaithne Buidhe, chief of Tellach-Cerbhallain, , died.
MacEideadhain or Mac Aodhagain (anglicised "MacEgan") were chiefs of Clan Diarmada, a district in the barony of Leitrim, county Galway; and had a castle at Dun Doighre, now "Duniry." The MacEgans were Brehons in Connaught, and also in Ormond; and many of them eminent literary men. The Mac Egans supplied hereditary Brehons to different parts of Ireland. O'Hart mentions the sept of O'Connaill or O'Connell, chiefs of the territory from the river Grian (or Graney), on the borders of Clare (barony of Upper Tulla), to the plain of Maenmoy: comprising parts of the barony of Leitrim in Galway, and of Tullagh in Clare. These O'Connells and the MacEgans were marshals of the forces to the O'Kellys, princes of Hy-Maine; and of the same descent as the O'Kellys, namely that of the Clan Colla.
- M1249, Boethius Mac Egan (chief), was killed in the battle near Athenry.
- M1273, Aireaghtagh Mac Egan (prince), was slain.
- M1309, Gilla-na-naev Mac Egan, Chief Brehon of Connaught, fell.
- M1317, Maelisa Roe Mac Egan, the most learned man in Ireland in law and judicature, died.
- U1327, Mael-Isu Mac Aedhagain (the Brown), died.
- M1329, Maelisa Donn Mac Egan, Chief Ollav of Connaught, died.
- LC1355, Tadhg Mac Aedhagain, died.
- LC1359, Aedh, son of Conchobhar Mac Aedhagain [the choicest of the Brehons of Ireland], died.
- M1378, Teige Mac Egan, Chief Brehon of Lower Connaught, a sage without contention or reproach, who kept a house of general hospitality for all comers, died.
- LC1390, Brian Mac Aedhagain, chief brehon of the Breifne, died.
- LC1399, Gilla-na-naemh Mac Aedhagain, ollamh of the East of Mumha in judicature, and Baethghalach Mac Aedhagain, ollamh-brehon of Uí -Fiachrach and Uí -Amhalghaidh, died.
- LC1401, Gilla-na-naemh Mac Aedhagain, ollamh-brehon of Uí -Failghe and Cenel-Fiachaidh, died.
- U1438, Concobur Mac Aedhagain died this year: to wit, the ollam of Clann-Ricaird, namely, one eminent in jurisprudence and so on.
- LC1529, The Cosnamhach, son of Ferghal, son of Donnchadh Dubh Mac Aedhagáin, the most eminent man in the lands of the Gaeidhel in fenechas, and in poetry, with lay Brehonship, died.
- LC1529, Domhnall, the son of Aedh, son of Domhnall Mac Aedhagáin, i.e. the Mac Aedhagáin of Ur-Mumha, i.e. head of the learned of Leth-Modha in knowledge and piety, died.
Clan Breasail - Chiefs of Clan Breasail, a district in the barony of Leitrim, county Galway, are identified by O'Hart as O'Domhnallain or O'Donnelan. McLysaght places them with Ballydonnellan, a district between Ballinasloe and Loughrea. They claim descent from Domhnallán, a lord of Clan Breasail, and were chiefly known as ollavs or poets. The Book of Lecan cites Muinter Domnalláin, in Húib Maine, as an alias for Clan Breasil. Clan Breasail is not to be confused with the Uí Bresail of Armagh.
- M1342, Flann Oge O'Donnellan, Ollav of Connaught in poetry, died.
- M1375, Melaghlin O'Donnellan, Ollav of Sil-Murray in particular in poetry, and the most learned man in all Ireland in the same art, died of Fiolun.
- M1407, Tuathal, the son of Melaghlin O'Donnellan, intended ollav of Sil-Murray in poetry, died.
- M1435, O'Donnellan, Cormac, son of Melaghlin, died.
- M1454, O'Donnellan, Flann, the son of Cormac, died.
- M1461, Melaghlin, son of Flann O'Donnellan, died.
- M1486, Flann, the son of Flann O'Donnellan, died.
- M1531, Tuathal, the son of O'Donnellan of Machaire-Maenmaighe, died.
- LC1561, Maelsechlainn, son of Tuathal O'Domhnallain, died: i.e. the ollamh of the greater part of Connacht in poetry, and a man who always kept a guest-house.