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Early Annalistic References and Regnal Succession

It is clear the Annals, confusingly, refer interchangeably to the Deissi Muman of (modern) Waterford and the Deissi Tuaiscirt of Thomond as 'Deissi' despite their seperateness. They can be distinguished by the geographical references and by the presence of the men in either the Dál gCais or Deisi Muman genealogies. This list continues to 934 where this name (Deisi) ceases being used to refer to the Kings of our line (the term 'Dál gCais' is first used).

Early Annalistic references to the Déissi

* FM = Annals of the Four Masters
* Tig = Annals of Tighearnach
* Ann Inisf. = Annals of Inisfallen
* AU = Annals of Ulster
* C.S = Annals of Clonmacnoise (?)
= Deisí Tuaiscirt

= Unknown

= Deisí Muman

= Deisí Breagha

Year (AD) Original (Pender) Translation
265 A naoi triocha do Chorbmac. Guin Ceallaigh mic Chorbmaic ocus reachtaire Chorbmaic ocus suil Chorbmaic budhein do bhrisedh d'aen fhorccom la h-Aengus gaibhuaibhtheach mac Fiachach suighde mic Feidhlimidh reachtadha. Ro bhris iaramh Corbmac seacht ccatha forsna Déisibh a ccionaidh an ghniomha sin go rostafainn ó a ttír conus filid hi Mumhain.—FM 265, Tig, Keating (ITS) II 1561-1563, 4841-4934. Ceallach, son of Cormac, and Cormac's lawgiver, were mortally wounded, and the eye of Cormac himself was destroyed with one thrust of a lance by Aenghus Gaibhuaibhtheach, son of Fiacha Suighdhe, son of Feidhlimidh the Lawgiver. Cormac afterwards fought and gained seven battles over the Deisi, in revenge of that deed, and he expelled them from their territory, so that they are now in Munster.
622 The battle of Carn Fearadhaigh was gained by Failbhe Flann over the Connaughtmen (see involvement of Díoma ,ALM page 92-94), wherein were slain Conall, chief of Ui Maine, Maeldubh, Maelduin, Maelruain, Maelcalgaigh, and Maelbreasail, and other nobles and plebeians besides them; and Guaire Aidhne was routed from the battle field; of which was said:

There fell of the Connaughtmen,
at Ath Cuma an tSeisir,
Maelduin, Maelruain, Maelcalgaigh,
Conall, Maeldubh, Maelbreisil.
632 Mors Cobthaig ríg na nDéis.—Ann. Inisf. Cobthaig, King of Déissi, died.
642 Mors Mail ochtraig ríg na nDésse.—Ann. Inisf. nd. In volume 5 of Ériu, J. G. O'Keeffe has edited (page 20 et seq.) a tale containing interesting details of Mael ochtraig and his son Bran find. Mail Ochtraigh, King of Déissi, died.
667/671 Guin Brain find mic Mail ectraig rí na nDési muman.—CS 663 (=667), 667(=671), AU 670 (=671), FM 666, 669, Ann. Inisf. I2b(=670), Tig ; and see Eriu 5, page 20 et seq. Bran Finn, son of Maelochtraigh, chief of the Deisi of Munster, was slain.
698/701 Iugulatio Conaill mic Suibne regis na nDéisi.—AU 700(=701), CS 696(=700), FM 698, 700, Tig; he was one of the sureties for the propagation of the Cain Adamnain, (Meyer's ed., ยง28 page 18, where he is called Conghal). Conall, son of Suibhne, chief of the Deisi, died.
710/712 Cath Chairn Feradhaigh las an Des tuaisgertoigh in ro marbhadh Cormac mac Fingin [Tig= Maenaigh] ri Mumhan.—FM 710, CS 708 (=712), Ann. Inisf. i2d(=7io). Tig. The battle of Carn Fearadhaigh by the northern Des, wherein Cormac, son of Finghin, King of Munster, was slain.
726/732 Iugulatio Daithgussa mic Baith regis na nDéisse.—AU 731(=732), FM 726, Tig. The mortal wounding of Doedhghus, son of Baeth, chief of the Deisi.
730/735 Cath Bealaigh Ele itir Cathal mac Finnguine ré Mumhan ocus Laighniu airm in ro marbhadh sochaidhe do Laighnibh. Do rochair do Muimhneachaibh ann Ceallach mac Faelchair toisech Osraighe ocus da mac Corbmaic mic Rosa toisich na nDeisi co tríbh mílibh amaille friú.—FM 730, AU 734(=735), Ann. Inisf. I2f (=735), Tig; Mors Cormaic mic Rossa rig na nDesse.—Ann. Inisf. i2f (=731). The battle of Bealach Ele was fought between Cathal, son of Finguine, King of Munster, and the Leinstermen, where many of the Leinstermen were slain. There fell of the Munstermen here Ceallach, son of Faelchair, chief of Osraighe Ossory, and the two sons of Cormac, son of Rossa, chief of the Deisi, with three thousand along with them.
744 Foirddbe Corcu mudruadh don Deiss.— AU 743 (=744). Tig. Destruction of Corcu Mo-Druad by the Déis.
746/750 Bás Muirghiusa maic Fergusa ríg na nDeise.—Tig (=AU 750, FM 746). Muirghius son of Fearghus, Lord of the Deisi, [died].
753/758 Niallgus mac Boith tigherna na nDéise bregh decc.—FM 753, AU 757(=758), Tig. Niallgus, son of Boeth, lord of Deisi Breagh, died.
759 Dunchadh mac Eogain tigherna na nDéisi décc.—FM 759. Dunchadh, son of Eogain, Lord of Deisi, died.
765 Torptha mac Cernaich tigherna na nDéisi dég.—FM 760 (recte 765); Ann. Inisf. i3c(=769) has: Mors Torptha rig Core mdruad. Torpaid, son of Cearnaigh, Lord of Déissi (also given as Corco Mruad), died.
821 Fineachta mac Badhbhchadha tighearna na nDéisi dég.—FM 821. Fineachta, son of Badhbhchadha, Lord of Deisi, died.
825/826 Corbmac mac Domhnaill tighearna na nDéisi décc.—FM 825, Ann. Inisf. I4c(=826). Corbmac, son of Domhnaill, Lord of Deisi, died. (Present in Deisi Muman genealogies, also a King of the Dál gCais. Difficult to distiguish who this refers to.)
836 Ar catha forsin Deis tuaisciurt o Genntibh.— AU 835 (=836). A most cruel devastation of all the lands of Connacht by the heathens. The heathens inflicted a slaughter in a battle won over the Déis Tuaisceirt.
846 Maidhm ria nDunadhach mac Dunghaile co nOsraighibh forsna Deisibh.—FM 846. A defeat by Dunadhach, son of Dunghaile, and the Osraighe, to the Deisi.
853 Is leo-side [sc. na Lochlannaig] ro ronad cath Cluana Daim forsna Desi du i drocairdar mathi na Desi uli.—Cog. Gaedh. re Gall., pages lxx, 22 (= 853 A.D.). A viking fleet defeated the Deisi at the Battle of Cluain Daimh, in which all the chiefs of the Deisi were slain.
856/858 Maol seachlainn mac Maol ruanaidh co feraibh Ereann cen mo tad Muimhnigh do dhol i ttíribh Mumhan co ndeisidh deich n-oidhche oc nEmlidh. Ro loiscc ocus ro indir Mumha co muir ind aen ló iar madhmaim for a ríoghaibh acc carn Lucchdhach co ffarccbadh ann lais Maol crón mac Muiredhaigh tanaisi na nDeisi [AU and CS=lethri na nD6se] co sochaidhe ele.—FM 856, AU 857(=8s8), CS 858. Maelseachlainn, son of Maelruanaidh, with all the men of Ireland, except the Munstermen, went into the territories of Munster, and tarried ten nights at Emlidh Emly; he burned and plundered Munster as far as the sea in one day, after having defeated its kings at Carn Lughdhach, where he lost Maelcron, son of Muireadhach, Tanist of Deisi, with many others. Maelseachlainn carried off the hostages of all Munster, from Cumar Tri nUisce to Inis Tarbhnai in the south west of Ireland, and from Dun Cearmna to Ara Airthir, on this expedition.
868 Indreadh na nDeisi la Cerbhall mac nDunghaile co n-Osraigibh ocus torchair Corcran mac Celechair ocus Gorman mac Lachtnain leo.—FM 868. The plundering of Deisi by Cearbhall, son of Dunghal, and the Osraighi, and Corcran, son of Ceileachar, and Gorman, son of Lachtnan, were slain by them.
874/876 Reachtabhra mac Brain fhind tighearna na nDeisi décc.—FM 874, CS 876 (=Rectapra mac Finnbrain); cf. Cog. Gaedh. re Gall., pages lxxiii and 24 : Is í sin bliadain [sc. 869] i drochair Colphfn ocus longes Duni Medoin i Cind Curraig. Ro bas ica marbad o Cind Curraig co Lis mor ocus do drocradar socaidi dib .i. la Rechtabrat mac Brain ; and again, pages lxix-lxxi and 22 : [853 A.D.], Tanic iar sin Reachtabhra, son of Bran Finn, lord of the Deisi, died. Also mentioned in Cogadh Gaedhil re Gallaib:And the slaughter of them (the danes) was continued from Cenn Curraig to Lis-Mor, and numbers of them were killed by Rechtabrat, son of Bran. (869 AD)Also mentioned: His son Muchthigheirn drowned in a cave in the previous incident at Cluain Daimh with the vikings (853 AD).
889 Niall mac Corbmaic tigearna na nDéisi déc.—FM 889. Niall son of Corbmaic, Lord of the Deisi, died.
890 Maol gorm tanaisina nDeisi do mharbhadh. —FM 890. Maelgorm, Tanist of the Deisi, was slain.
894 Niall mac Laogaire rí na nDése moritur.— CS 894. Niall, son of Laoghaire, King of Deisi, died.
891/896 Flann mac Lonain h Ghuaire do ghuin lasna Deise muman.—AU 895 (=896), CS 896, FM 891. Flann, son of Lonan, the Virgil of the race of Scota, chief poet of all the Gaeidhil, the best poet that was in Ireland in his time, was secretly murdered by the sons of Corrbuidhe (who were of the Ui Fothaith), at Loch Dachaech, in Deisi Mumhan..
897 Cormacc mac mothla do gabail rige na nDesse ocus Mael bennachtha do marbad laiss.—Ann. Inisf. I5e(=897) Cormac, son of Mothla took the kingship of the Déisi, and Mael Bennachta was killed by him.
905 Buadach mac Mothla tanaisi na nDéisi décc.—FM 905. Buadach, son of Mothla, Tanist of the Deissi, died.
915 Maol ruanaidh mac Neill tanaisi na nDéisi do mharbhadh la Corbmac mac Mothla tighearna na nDéisi.—FM 915 Maelruanaidh, son of Niall, Tanist of the Deisi, was slain by Cormac, son of Mothla, lord of the Deisi.
918 Cormac mac Mothla ri na nDeisi moritur.—CS 918(=919), FM 917 Cormac mac Mothla, king of the Deisi, died.
920 Martra Cormaic meicc Cuilennain epscuip ocus secnap Lis moir ocus abb cille Molaisse ocus ri na nDesse ocus cend athchomairc Muman olchena la hu Fothaid aiched.—Ann. Inisf. i6d (=920), AU 9i9(=92o); and see AU note and Keating (ITS) III 3207 et seq. Kl. The martyrdom of Cormac son of Cuilennán, bishop and vice-abbot of Les Mór, abbot of Cell Mo-Laise,king of the Déisi, and chief counsellor of Mumu, at the hands of the Uí Fhothaid Aiched.
934 Repose of Rebachán son of Mothla, abbot of Tuaim Gréine and king of Dál Cais.
934 Duibhghiolla mac Robacáin, tighearna Ua Corbmaic, do mharbhadh la Congalach mac Lorcáin trí tangnacht. AU 934; AFM 932 = 934 Dubh Gilla the son of Rebechán, Lord of Uí Corbmaic, was killed treachorously by Congalach the son of Lorcáin.
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