821 - 830 AD 

821 AD 100.Artri the Eoghanacht Glendamnach 21st King of Cashel / Munster abdicated and died, who was a son of 99.Cathal the previous 19th King of Cashel / Munster, a son of 98.Finguine the 16th King of Cashel / Munster, who was one of the 2 sons of 97.Cathal Cu Cen Mathair - the Motherless Hound the 14th King of Cashel / Munster, descended from 93.Criffan / Crimthann Srem Feimin the direct male line ancestor of the Glendamnach Septs. 101.Toole / Tuathal became the Eoghanacht Glendamnach 21a King of Cashel / Munster who was a son of 100.Artri the previous 21st King of Cashel / Munster. 

       97.Tnuthgal became the new Eoghanacht Chaisil 22nd King of Cashel / Munster, who was a son of 100.Donngus, one of the 3 sons of 99.Donngal / Dungalach, the son of 98.Faelgus, one of the 2 sons of 97.Nad Fraich, a son of 96.Colgan / Colgu the previous 15th King of  Cashel / Munster, one of the 2 sons of 95.Failbe Fland the 11th King of Cashel / Munster, descended from 92.Felim / Feidlimid the Chaisil 4a King of Cashel / Munster.

      100.Felim / Feidlimid mac Crimthainn became the new Heberian Eoghanacht Chaisil 23rd King of Cashel / Munster, who was the son of 99.Criffan / Crimthann, the son of 98.Dubh Da Crich, the son of 97.Colman, the son of 96.Sechnussach, the son of 95.Fingen who had been the previous 9th King of Cashel / Munster who had died way back in 619 AD, as none of 100.Felim's immediate ancestors had been Kings of Cashel / Munster for 228 years. 100.Felim mac Crimthainn was to rule until 847 AD, a period in which there was to be a great influx of Viking raids throughout Ireland of which he was to seem to be totally oblivious of, and the resulting circumstances that would continue to occur because of his indifference. He was to have two main objectives, the first would be centred on trying to bring to an end to the Heremonian Dal Cuinn Ui Niaill ambitions of High Kingship of Ireland, while his second was to bring about religious reform in the monasteries. To these ends he  endeavoured to confine the Dal Cuinn Ui Niaill to their own territory in the north in Leath Cuinn / Conn's Half, but despite this he was to also be open to the idea of High Kingship for himself, as he was the Heberian overlord of Leath Moga / Mogha's Half in the south of Ireland. He was always to be on very friendly terms with the reforming religious order known as the Celi De / Culdees (Servants or Clients of God) and he never took on the Vikings like he should have, but actually did what they did, and because of his long reign and restricted outlook he lost a golden opportunity to bring to an end initially their constant attacks on the Celtic Septs of Ireland. By his indifference he was to encourage their further advance into Ireland, by basically ignoring them, and concentrating more on his reforming religious agenda. He was to plunder the monasteries that the Celi De especially considered needed reforming, such as Clonfert in Co. Galway in the south - west  of the Connacht Province, Clonmacnoise and Gallen in Co. Offaly in the north - west of Southern Leinster, Durrow in Co. Laois in the mid - north - west of Southern Leinster, and Kildare in Co. Kildare in Central Southern Leinster. He also captured and ill - treated the Abbot of Armagh from the Ulster Province, and allowed the Abbot of Cork to die in prison at Cashel in Co. Tipperary in the north - east of the Munster Province for which he was to be struck down by St. Kieran / Ciaran. He was to be the first of the Irish Kings to carry on like this, and the Irish Septs who eventually survived the continual Viking raids under his watch, only had the protection of their Chiefs or sub - Kings from their individual Septs to thank, due to his complete indifference to the ongoing Viking violations. This meant that their Family regions / Tuaths became a storage place for their individual valuables and therefore they also became fair game for their enemies and any one else who might decide to attack them.

      100.Felim mac Crimthann the 23rd King of Cashel / Munster became one of the 12 leading members of the Celi De / Culdees, with 3 representatives in Tallaght in Co. Dublin, 1 in Co. Westmeath, 4 in Co. Kildare and Co. Clare, 2 in Co. Cork, and 5 in Co. Tipperary who all used to meet at Druim Ednech / Druim Abrat for prayer before arriving at Tallaght, which was their Mother church.

       100.Felim mac Crimthainn as the Heberian Eoghanacht Chaisil 23rd King of Cashel / Munster first sought to take hostages from the 7 Septs of the Eoghanachta / Saer Thuatha, but the Ui Liathain, Ui Cairpre and Ui Chonaill Gabra Septs refused to agree, unless he first gained hostages from the Heberian Dal gCais / Dalcassian Sept in Thomond / Northern Munster who always did their own thing, and if he was to succeed in receiving submission from them they advised him that they too would submit to him. The In Deis Tuaiscirt / Dal gCais Sept having won Co. Clare as sword - land would not pay tribute for it to anyone. He approached 102.Lachtna, the Heberian Dal gCais Ui Turlough King in Co. Clare in Thomond, who was to be so impressed by the committed religious piety he expressed that he agreed to give him their allegiance, for which he then waived any claim to tribute against Thomond. 102.Lachtna was so taken by his piety that he even invited him to spend Lent among the Dal gCais Septs. The reforming members of the Celi De / Culdees who 100.Felim so solidly supported, were antagonistic to the other religious members of the older churches / Lucht na Sen - Chell, who from their particular point of view were corrupt and decadent. Because of their strong reforming zeal the members of the Celi De were to become the future Bishops (supervisors) to the Kings of Munster during the 9th and 10th Centuries AD.

      This year the Vikings (Norsemen) attacked and partly destroyed the monastery at Nendrum, which was on an island in the Strangford Loch / Loch Cuan in the north - east of the Ulster Province, which would be rebuilt later on with a stone wall and tower attached, but their continuing raids from now on were to continue to fracture the Irish Septs and especially the Septs' adherence to the Brehon Law, as it now come down to the survival of the fittest.

822 AD The Vikings carried out more raids on Co. Cork in Southern Munster where they also set up a camp in that area, and it soon become a Norsetown, and the monks there at the monastery of St. Finnbarr were then forced to try and gather together any of their remaining members who had been scattered during the attacks.

823 AD It seems that at this time the Vikings were only seen as a nuisance, but in a sign of what was really to come this year they defeated the Heremonian Ui Laoghaire Ui Connla Septs of Ossory in Co. Kilkenny in the south - west of Southern Leinster in a ferocious battle. The tempo of their attacks was increasing, as the most important monastery in Ireland at Armagh in the south - east of the Ulster Province was raided by them three times in a month, and the Danish Vikings also raided the Bangor monastery on the coast in Co. Down in the south - east of Ulster killing many of the scholars there, and they also destroyed the shrine there of the founder, the Irian monk St. Comgall.         

       Despite these early warning signs of things to come, 100.Felim mac Crimthainn the Eoghanacht Chaisil 23rd King of Cashel / Munster in the south had other fish to fry, and he went after the Heremonian Dal Cuinn Ui Maine Sept in the north - east of the Connacht Province instead, were he was defeated by Cathal, the son of Ailill, who was the Ui Maine King at Magh nAi (The Plain of Ai). 100.Felim mac Crimthainn  and Artri, the son of Conor, who was the Abbot of Armagh now joined together in a proclamation in the Munster Province based on the teachings of St. Patrick known as the Lex Patricii / Cain Phatraic / The Law of Patrick. This year he also burnt the Gallen monastery / Galine na mBretan in Co. Offaly in the north - west of Southern Leinster, which was actually at this time in Leth Cuinn / Conn's Half the territory of the Heremonian Dal Cuinn southern Ui Niaill Septs.

     Cathal, the son of Ailill, the Dal Cuinn Ui Maine King along with a Vice - Abbot of Clonmacnoise in Co. Offaly in the north - west of Southern Leinster were drowned in the River Shannon this year. In an expression of what the  Clonmacnoise monastery in Co. Offaly meant to all of the Heremonian Septs, Flann, the son of Flaherty / Flaithbertach from the Ui Forga Sept, which was a Sept of the Heremonian Ui Conaire Muscraige Tire arranged for 7 churches to be constructed there. (The Ui Forga territory was around Nenagh in the north - west of Co. Tipperary just to the south of the Northern Munster border, and adjacent to Loch Derg),

824 AD The monastic community of Co. Kildare in Central Southern Leinster plundered Tallaght / Tamhlacht (The Grave), which was the Mother church of the Celi De / Culdee reformers situated in Co. Dublin in the north - east of Southern Leinster.

      The Vikings invaded the Skellig Michael monastery off the coast of Co. Kerry in the south - west of the Munster Province again, and carried off Eitgal the Abbot of Skellig Michael who was to eventually escape, but was later to die of hunger and thirst, and although Cormac, the son of Shally / Selbach was also taken hostage he too had managed to escape. Elann the son of Kelly / Ceallach who was then the Abbot of Skellig Michael, died this year also.

      The Vikings again raided the Bangor monastery in Co. Down on the south - east coast of the Ulster Province, originally founded by St. Comgall, who had been born across the loch at Black Head, and as he had been well known for his piety and learning this had induced multitudes of scholars to come to his school there from many distant parts, with up to 3,000 students and teachers there at one time. His evangelistic zeal was so inspiring, and he had encouraged many of his disciples, such as St. Columbanus and St. Gall, to embark from there in their coracles to spread the Gospel of Christ all over Europe. Unfortunately this particular time the Vikings carried out a total blood - bath managing to kill all of the 3,000 who were studying there during their vicious attack, who were naturally totally undefended

825 AD This year the Vikings also plundered the St. Mullins monastery / Tigh Moling in Co. Carlow in Southern Leinster.

      100.Diarmait, died, who was the leader of the Celi De / Culdees, and the grandson of 98.Aed Roin the previous Dal Fiatach 19th King of Ulaid in the north - east of the Ulster Province. He had previously founded the Hermitage known as Dysert Diarmata at Castledermot in Co. Kildare in Central Southern Leinster on land given to him by 104.Bran Ardchenn who had been the Cu Corb Ui Dunlainge 21st King of Leinster who had been a disciple of St. Comgall. 

          Artri, the Abbot of Armagh in the south - east of the Ulster Province, who was a son of Conor, now pushed forward The Law of Patrick / Lex Patricii in the Connacht Province to try and bring about peace  among the Septs there.

       102.Mael Bressail the Irian Dal nAraidi Ui Echach Cobo 26th King of Ulaid, who had his territory in the east of the Ulster Province, died, who was a son of 101.Ailill, a previous Ui Echach Cobo King, a grandson of 99.Mael Cothaig, one of the 2 sons of 98.Fergus the previous 16th King of Ulaid, who had been the first one of the Sept to be a King of Ulaid, emanating from 91.Eochy / Echu, who was one of the 3 sons of 90.Crond Ba Drui. This was to see the end of his particular Irian Ui Ecach Cobo male line to the Kingship).  

      101.Murray / Muireadach became the Dal Fiatach 27th King of Ulaid in the east of the Ulster Province, who was one of the 2 sons of 100.Eochy / Eochaidh the previous 24th King of Ulaid, one of the 2 sons of 99.Fiachnae the 22nd King of Ulaid, descended from 91.Murray / Muireadach Muinderg the Dal Fiatach 1st King of Ulaid, one of the 2 sons of 90.Forgg mac Dallain.

826 AD 100.Felim mac Crimthainn the Heberian Eoghanacht Chaisil 23rd King of Cashel / Munster besieged the southern Ui Niaill Ui Fiachach kingdom of Delbna Bethra near Clonmacnoise in Co. Offaly in the north - west of Southern Leinster, but his protege, Artri, the son of Conor / Conchobar still failed to become the Abbot of Armagh.

827 AD The Dal Cuinn northern Ui Niaill Cenel nEogain Septs were now totally dominant in the north of the Ulster Province, and were a real threat to the overall authority of the Irian Ulaid Septs who had their territory in the north - east of Ulster. 101.Murray / Muireadach the Dal Fiatach 27th King of Ulaid and many from the surrounding Heremonian Dal Cuinn 3 Colla kingdom of Orghialla / Airghialla (Oriel) kingdom were slain in battle at Leth Carn during the advance of the Dal Cuinn northern Ui Niall Cenel nEogain Septs into the territory there in Central Ulster and Co. Armagh in the south - east of Ulster. They were defeated by *101.Niall Caille the Dal Cuinn northern Ui Niaill Cenel nEogain 23rd King of Aileach who was the Tanaiste / heir apparent who had his territory also in Ulster, who would later become the 161st and High King of Tara / Ireland. The conflict seemingly had come about due to the dispute over who would be the Abbot of Armagh, but the conflict was in reality about who had the overall authority over the various Septs of Orghialla / Airghialla, as the Cenel nEoghain Sept had already won over their Colla Da Crioch kinsmen, the Airthir Sept, by supporting them against the interests of their other kinsmen the Colla da Crioch Ui Cremthainne Sept. The office of Abbot of Armagh was to be given to the Dal Cuinn Colla Da Crioch Airthir Sept from now on. Despite their loss of authority in Ulster the Dal Cuinn 3 Colla kingdom of Orghialla / Airghialla was still to continue on, but they would now be subject to the overall authority of their Dal Cuinn kinsmen the northern Ui Niaill Cenel nEogain Sept of Aileach, who now also had territory in Co. Tyrone / Tir Eogain (The Land of 91.Eogan) where they were to hold their future Inaugurations at Tulach Oc near Dungannon, and be interred at Armagh Abbey in the south - east of Ulster. The Ui Nadsluaig Sept, who were also a Sept of the Colla Da Crioch Ui Cremthainn Sept, shifted further down to the south from out of Clogher and Clones to Farney in southern Co. Monaghan, reducing the Colla da Crioch Ui Meith Sept, the Colla Mend Mugdorna Sept and 3 Colla Fir Ros Sept to subordinates. This was all to lead on to indirect control of the Armagh Abbey, and vindicate Eogan Mainistrech there as the recognized Abbot of Armagh, as the overall control of the Armagh Abbey was possibly now just as important as claiming the Kingship of Tara.

      100.Felim mac Crimthainn the Eoghanacht Chaisil 23rd King of Cashell / Munster met with *102.Connor / Conchobar the Heremonian Dal Cuinn southern Ui Niaill Clann Cholmain 165th King of Ireland at the monastery of Birr near the Northern Munster border, as the raids carried out by 100.Felim mac Crimthainn on the Dal Cuinn southern Ui Niaill were a threat to *102.Connor and to Artri winning the position of Abbot of Armagh.

        The Viking build up really began as 60 Viking ships appeared this year on the River Boyne in the north, and another on the River Liffey in the south near Dublin in the north - east of Southern Leinster. At this time, Abner was the Abbot of Killeigh  / Cill Achaidh (The Church of the Field) in Co. Offaly in the north - west of Southern Leinster).

828 AD The Fir Ardda Cianachta Sept in the Barony of Ferrard drove off Cummaseach the Dal Cuinn southern Ui Niaill Siol nAedo Slaine King of Knowth / Northern Brega who wanted to put his son, Kenneth / Cinaed in there as a Siol nAedo Slaine King. The Colla Ui Macc Uais Breg Sept, the Colla Mend Mugdorna Breg Sept, the Cianachta Gailenga Breg Sept, and the the Dal Cuinn southern Ui Niaill Fir Chul Breg Sept, who were a separate Sept of the Siol nAedo Slaine Tuath, were all Septs in the north of Co. Meath in the south - east of Northern Leinster. When the Fir Chul Breg Sept were to eventually disappear into oblivion, the Cianachta Gailenga Breg Sept were to take over their territory and kingdom, and the Cianachta Luigni Mide Sept were to take over from their previous overlords the Dal Cuinn southern Ui Niaill Cenel nArdgail Sept in the south - east of Midhe / Meath. The Dal Cuinn Siol nAedo Slaine Sept were now to be further weakened by the ongoing opposition of their own kinsmen the Dal Cuinn southern Ui Niaill Clann Cholmain Sept who were from now on to become predominant there as the Dal Cuinn southern Ui Niaill Kings of Ireland instead.

      98.Eladach from the Heberian Eoghanacht Raithlind Sept, died, who was the son of 98.Shally / Selbach, a son of 96.Clarenach, a son of 95.Coirpre Riastrain, a son of 94.Aed Osraige, one of the 2 sons of 93.Leary / Loegaire, one of the 2 sons of 92.Criffan / Crimthann, a son of 91.Eochy / Echu the direct male line ancestor of the Ui Echach Muman Sept, a son of 90.Mac Cass the ancestor of Desmuma in Desmond / Southern Munster, who was another of the 7 sons of 89.Conall Corc. 98.Eladach had been killed in a battle along with 170 others against the Heremonian Ui Conaire Muscraige Mittine Sept in the Munster Province, and this gave 101.Felim mac Crimthainn  the Eoghanacht Chaisil 23rd King of Cashel / Munster also a hold in Desmond / Southern Munster, as the Eoghanacht Raithlind Sept, just like the Eoghanacht Locha Lein Sept, had regarded themselves as separate Eoghanacht over - kingdoms.

       Cairpre, the son of Cathal, who was the Heremonian Cu Corb Ui Cheinnselaig King was joined by the warriors from Taghmon / Teach Munna (Munna's House) in Co. Wexford in the south - east of Southern Leinster, and they took the Vikings head on and defeated them there.

829 AD 105.Murray / Muireadach the Heremonian Ui Laoghaire Cu Corb Ui Dunlainge Ui Faelain 23rd King of Leinster, died, who was one of the 2 sons of 104.Rory / Ruaidri the previous 20th King of Leinster, the son of 103.Faelan the 16th King of Leinster who is the direct male line ancestor of the Ui Faelain Sept. His demise would see the Ui Faelain male line then continue on through his brother, 105.Diarmait, who would be the father of 105.Muirecan who would become the 29th King of Leinster.

    105.Kelly / Ceallach became the Heremonian Ui Laoghaire Cu Corb Ui Muireadhaigh 24th King of Leinster, who was one of the 2 sons of 104.Bran Ardchenn the previous 21st King of Leinster, the son of 103.Murray / Muireadach the Ui Dunlainge 18th King of Leinster who is the direct male line ancestor of the Ui Muireadhaigh Septs of Southern Leinster.

    In a further expression of his overall authority *102.Conor / Conchobar the Heremonian Dal Cuinn southern Ui Niaill Clann Cholmain 165th King of Ireland sent his forces from Midhe / Meath against the Dal Cuinn Septs in the Connacht Province and defeated them.

     The Council of Paris this year decried the harsh penalties the Irish monks imposed on themselves and their hard way of life. 

830 AD 101.Felim mac Crimthainn the Eoghanacht Chaisil 23rd King of Cashel / Munster won a victory over the Dal Cuinn southern Ui Briuin Sept of Mag Seola, and although it was a combined Heremonian Dal Cuinn Ui Briuin and Ui Niaill force, 102.Follaman, the brother of *102.Conor / Conchobar the Dal Cuinn southern Ui Niaill Clann Cholmain 165th King of Ireland, was killed by the Munster Province forces during the attack on the Connacht  Province, and 101.Felim also burnt the monastery at Fore / Foir.

     From now on the Vikings were to be left alone by 100.Felim mac Crimthainn, and feeling more confident were to become totally officious carrying out further large scale attacks, with Turgesius the Viking Norwegian Prince becoming their overall leader in Ireland were he made Armagh in Co. Armagh in the south - east of the Ulster Province his main seat. He took over the abbeys and the churches putting in his own Abbots in charge, with a Dane in charge of each region, with each Irish family to maintain one of his men there, and he forbid education and books, and the manuscripts were burnt, and poets, historians and musicians were imprisoned or driven off into the mountains and woods. Feeling real confident he sacked the ancient capital of Tara in Co. Meath in the south - east of Northern Leinster and destroyed the altars there, while setting up his camp at the entrance of the Ulster Gap (The Pass of Moyry) to try and gain complete control over all of Ireland.

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