871 - 880 AD 

871 AD 101.Cathalan from the Heremonian Dal Fiatach Leth Cathail Sept, died, who was the King of Leth Ulaid, and one of the 2 sons of 100.Indrechtach, a son of 99.Tumelty / Tomaltach, a son of 98.Cathal the direct male line ancestor of the Leth Cathal Sept, who was a son of 97.Murray / Muireadach, the son of 96.Angus / Oengus one of the 2 sons of 95.Mael Cobo the previous 13th Dal Fiatach King of Ulaid who had his territory originally in the east of the Ulster Province.

     107.Ailill the Heemonian Cu Corb Ui Dunlainge Ui Muireadhaigh 31st King of Leinster, died, whose father was 106.Dunlaing the previous 30th King of Leinster, and his Ui Muireadhaigh male line was to be carried forward by his son, 108.Augaire who was to become the future 35th King of Leinster.

872 AD 99.Kennelly / Cenn Faelad the Heberian Eoghanacht Airthir Chliach 27th King of Cashel / Munster, died, who was a son of 98.Murrough / Murchad, one of the 2 sons of 97.Mugthigern, descended from 93.Criffan / Crimthann the direct male line ancestor of the Airthir Chliach Sept who was a son of 92.Eochy / Eochaidh the 4th Chaisil King of Cashel / Munster descended from 89.Conall Corc the 1st King of Cashel / Munster.

       102.Donough / Dunchad became the new Heberian Eoghanacht Chaisil 28th King of Cashel / Munster, who was a son of 101.Dub Da Bairenn, a son of 100.Crundmael, one of the 3 sons of 99.Dongal / Dungalach, a son of 98.Faelgus, one of the 2 sons of 97.Nad Froich, a son of 96.Colgan / Colgu the previous 15th King of Munster and 106.Carroll / Cerball the Heremonian UI Connla King of Ossory / Co. Kilkenny who had his territory in the south - west of Southern Leinster in Mogha's Half, now allied with 102.Donough the 28th King of Cashel / Munster and together they besieged the Connacht Province.

       Ivar the Boneless, the Norwegian Viking son of Ragnar, died this year. 

     104.Mugron the Heremonian Dal Cuinn Ui Briuin Ai Siol Muireadhaigh / Sil Murray Siol Cathail 38a King of Connacht, died, who was a son of 103.Mael Cothaid the previous 32nd King of Connacht, one of the 2 sons of 102.Faghartach, one of the 4 sons of 101.Cathal the 23rd King of Connacht the direct male line ancestor of the Siol Cathail Sept. 104.Mugron was to be the last of the Siol Cathail Sept to become a King of Connacht. His son, 105.Murray / Muireadach, who was to die in 912 AD, was to become the eventual Dux of the Clann Cathail, which was to then end their aristocratic Siol Cathail male line altogether to the Kingship descending from 98.Reilly / Raghallach mac Uatach the direct male line ancestor of the Ui Briuin Ai who had been the 12th King of Connacht.

873 AD The Irish Septs were now able, to once again, drive the Vikings out of their settlement on the coast at Dublin in the north - east of Southern Leinster.

      101.Lethlobar the Gaelic Milesian Irian Dal nAraidi 29th King of Ulaid, died, who was a son of 100.Lynch / Loingsech, the son of 99.Tomaltach the previous 23rd King of Ulaid, descended from 90.Crond Ba Drui through one of his 2 sons, who had been  *91.Coelub. the Gaelic Milesian 123rd King of Tara . Ireland and his Dal nAraidi male line was to be continued on through his son, 102.Kennedy / Cenn Etig who was to became the future the 30th Dal nAraidi King and the Irian 36a King of Ulaid.

      The monastery at Nendrum in Co. Down in the south - east of the Ulster Province was attacked again by the Vikings, and the Abbot there was killed, which led to the monastery there also being abandoned as their books were destroyed by drowning, as they had no value at all to the Vikings who just took all of the metalwork as loot.

873 AD - 888 AD 106.Carroll / Cerball the Heremonian Ui Connla King of Ossory / Co. Kilkenny who had his territory in the south - west of Southern Leinster, due to his Viking connections was now able to protect his territor y in Southern Leinster.

875 AD Charles 11 - the Bald was the King of the Franks and the Holy Roman Emperor and John Scotus Erigena - the Irishman who was also a Greek scholar at this time taught philosophy in Paris as head of his school.

      104.Flann Sinna the Heremonian Dal Cuinn "southern" Ui Niaill Clann Cholmain Prince / Tanaiste / heir apparent was at this time beginning to assert his own authority also on those in the Munster Province in preparation for becoming the future Ui Niaill King of Ireland, and in doing so he came up against 103.Larkin / Lorcan / Finghin from the Heberian Dal gCais Ui Turlough Sept and his warriors from Co. Clare in Thomond / Northern Munster. The Dal gCais / Dalcassians were descended from 85.Cormac Cass - of the Curly Hair, the younger brother of 85.Eoghan Mor the direct male line ancestor of the Eoghanachta Septs who were now the Kings of Cashel / Munster. At this time, what was about to occur was to revive the fortunes of the descendants of 85.Cormac Cass, and change the history of Ireland greatly. 103.Larkin was to become the father of 104.Kennedy / Cennetig and the grandfather of *105.Brian Boru - of the Tributes the future Gaelic Milsian Heberian Dalcassian 175th High King of Ireland. He in turn was to be the ancestor of the O Briens / Ui mBriain of Thomond / Northern Munster. 105.Mahon who was *105.Brian's older brother was also to become the first Dalcassian King of Cashel / Munster, while another older brother 104.Duncan / Donncuan was to be the ancestor of the O Kennedys. 104.Flann Sinna in a fit of superiority took it upon himself to defile Magh Adhair (The Meadow of the Sacred Oaks the Crowning / Inauguration Place of the Dal gCais Kings of Thomond in Co. Clare) by playing chess on the mound. He did this to assert his Ui Niaill authority over the Heberian Dalcassians and their genealogical and subservient connection to the Heberian Eoghanachta, and for carrying out this sacrilege he was pursued by 103.Larkin the Dal gCais Chieftain who was able to defeat him and his Dal Cuinn "southern" Ui Niaill followers. 101.Flann Sinna in dismay then wandered about the Co. Clare district for 3 days in shock until he finally was forced to surrender to 103.Larkin. The Meadow of the Sacred Oaks / Magh Adhair is situated at Toonagh in Clooney Quin in Co. Clare, which was originally the main centre of the Dal gCais territory of Northern Munster, where it was formed by a triangular area, which took in Ennis in the west, which is now the main town of Co. Clare, over to Quin in the east, and up to Tulla in the north east. The two great Oaks / Daire, which were growing there originally provided the canopy for the Dal gCais Inauguration Ceremonies were 57 Kings of Thomond were to be Inaugurated, as the Chiefs, sub - chiefs, warriors, Brehon Lawyers, poets, historians, Bishops, Abbots and the priests assembled there for the Inaugurations. The historians, bards recited the Brehon / Breiteamph Laws, which the Dalcassian King would have to observe, and he was then given a straight White Wand a s a symbol of what his conduct, as a leader of the Dal gCais Septs, should be, turning 3 times to the left and 3 times to the right, while viewing his subject territory, as he was proclaimed their new Dal gCais King. 

876 AD 106.Carroll / Cerball the Heremonian Ui Laoghaire Ui Connla King of Ossory / Co. Kilkenny who had his territory in the south - west of Southern Leinster defeated the Heremonian Ui Laoghaire Ui Lughaidh Cu Corb Septs in battle in Southern Leinster at Fulachta with great slaughter over who now had the overall authority there in Southern Leinster.

       104.Coirpre mac Diarmait / Cairpre mac Diarmata the Heremonian Cu Corb 42nd Ui Cheinnselaig King, who was a brother to 104.Teague / Tadhg mac Diarmata, who had been his predecessor, was to be killed in a similar manner to his brother. Their father, 103.Diarmait, was a son of 102.Rudgal, a son of 101.Aed, whose father had been 100.Onchu, one of the 2 sons of 99.Faelan the previous 9th Ui Cheinnselaig King, In turn his father had been 98.Silan, one of the 2 sons of 97.Eoghan Caech the 7th Ui Cheinnselaig King, the son of 96.Nath I the 4th Ui Cheinnselaig King, the son of 95.Criffan / Crimthann who had been the 1st Ui Cheinnselaig King and the Cu Corb 3rd King of Leinster, who had been a son of 94.Enda / Enna Cennsalach the Cu Corb 2nd King of Leinster who is the direct male line ancestor of all the Ui Cheinnselaig Septs. 104.Cairpre’s son, his grandson, and great - grandson, were to also be Ui Cheinnselaig Kings, and the Ui Cheinnselaig Sept would grow stronger once again in the next Century, culminating in a long awaited return of the Kingships of Leinster for their Sept and the eventual appearance of 113.Diarmait mac Murrough Na Gall. 

876 AD 102.Aedh Findliath - of the White Hair who had been the Gaelic Milesian Heremonian Dal Cuinn "northern" Ui Niaill Cenel nEogain 168th High King of Ireland for 16 years, died on 20^th November this year, at Druim Inesclainn in the territory of the Dal Cuinn "northern" Ui Niaill Cenel Conaill Sept. (He had been a son of *101.Niall Caille the previous Gaelic Milesian 166th King of Ireland, and his male line would evolve into the O Nialls / O Neills and Mac Loughlins in the Ulster Province who would become the future Kings of Ireland.

    106.Carroll / Cerball the Heremonian Ui Laoghaire Ui Connla King of Ossory / Co. Kilkenny who had his territory in the south - west of Southern Leinster now allied with the Heremonian Ui Cobhthaigh Ui Felim Deisi Sept who had their territory in Co. Waterford in the south - east of the Munster Province in Mogha's Half and they defeated the Heberian Septs of Munster.

877 - 914 AD *104.Flann Sinna the 29th Clann Cholmain King was the Gaelic Milesian Heremonian Dal Cuinn "southern" Ui Niaill 169th King of Ireland, who was a son of *103.Malachy 1st / Mael Sechnaill the previous Gaelic Milesian 167nd High King of Ireland.

    The Vikings began returning to Ireland in droves, setting up their long forts / fortresses so that they could raid the monasteries and the cattle farms along the River Shannon, with its entrance through the estuary between Co. Limerick and Co. Clare in the north - west of the Munster Province.   

879 AD The Vikings attacked Armagh again in the south - east of the Ulster Province from out of their settlement at Carlingford in Ulster.       

880 AD 106.Carroll / Cerball the Heremonian Ui Laoghaire Ui Connla King of Ossory / Co. Kilkenny who had his territory in the south - west of Southern Leinster was now so strong that he was able to capture Dublin in the north - east of Southern  Leinster from the Vikings.

     Perrone (Perronna Scottorum), a noted Irish Centre founded by St. Fursa who had died in 650 A.D was destroyed this year by the Vikings.

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