Laigin of Leinster
Cauci Celts who had their territory in Co. Carlow in Southern Leinster with the Brigantes Sept and Coriondi Sept and were also in Co. Kilkenny in the south - west of Southern Leinster with the Brigantes in Co. Kildare in Central Southern Leinster to the east, and also nearby in Co. Wicklow in the south - east of Southern Leinster, who were of Belgic Gaul origins.
Coriondi / Coriundi Celts who had their territory in Co. Carlow with the Brigantes and Cauci, but who also further south in the middle and northern parts of Co. Cork, especially around the region that is now Cork City, and were also in Co. Limerick and Co. Tipperary in Northern Munster. They were kinsmen to the Coritani who were a Celtic Sept in the eastern part of Albion / Briton. They were also in Co. Kildare in Central Southern Leinster in territory west of the Rivers Liffey and Slaney, bounded in the north by the Rivers Boyne and Barrow with the Cauci and Menapii Septs on the east, the Eblani Sept to the north and the Brigantes to the south.
Brigantes Celts who had their territory in Co. Carlow in Southern Leinster with the Cauci and the Coriondi and also in Co. Kilkenny in south - west of Southern Leinster with the Cauci. They may have also been in Co. Laois in the mid - north - west of Southern Leinster.
Menapii / Manapii Celts descended from the Menapii in Belgic Gaul who were of Fir Bolg decent whose territory in Ireland was in Co. Waterford in the south - east of the Munster Province and nearby in Co. Wexford in the south - east of Southern Leinster where their territory bordered on the River Slaney / Modonus on the bank of which they had their chief fortress of Menapia / Wexford and they were also in Co. Kildare in Central Southern Leinster.
Under the overlordship of the Gaelic Milesian Heberians, descended from *37.Heber Fionn = of Fair Complexion the 1st joint King of Erinn / Tara one of the 8 sons of 36.Mil the Gaelic Celtic Hero of Spain and 3rd King of Castile and Portugal, the territory in what is now Southern Leinster and the Munster Province in the south of Ireland below Dublin in 1699 BC became 37.Heber's Half.
The original Celtic tribe from which Leinster - pro. (Linster) receives it name came into Ireland around 300 BC from the north - west of Gaul / Normandy and is believed to be from the same Scythian Sept as Attila the Hun originated, and they first settled in the territory that is now the Leinster Province and then expanded further to the west into the Connacht Province, forcing the Fir Bolg further out to remoter areas. The Dumnonii had originally migrated from the western region of Gaul / Normandy under Roman pressure around 100 BC settling first into Southern Albion / Briton and then into Ireland. As the Laigin - (Lin) (People of the Spear) the Cauci, Menapii, Coriondi, Brigantes, Dumnonii and Usdiae they gave their name to Lin Tir / Leinster (The Land of the People of the Spear).
Prior to the new Millennium 84.Cu Corb descended from *59.Ugaine Mor - the Great the Heremonian 66th King of Tara / Ireland through one of his sons, *60.Leary / Laoghaire Lorc the previous 68th King of Tara / Ireland (Ui Laoghaire) and then his descendant 78.Lewy / Lughaidh (Ui Lughaidh) held territory in Co. Offaly and Co. Laois in what is now Southern Leinster where he came under the overlordship of the Heberians descended from *37.Heber Fionn. He was to be assisted to drive them off by *69.Laoiseach Ceann Mo, the son of 68.Conall Cearnach - of the Victories the leader of the Irian Knights of the Red Branch of Ulster, who had came down from the north - east of the Ulster Province and was descended from 37.Ir, *69.Laoiseach Ceann Mor then became the direct male line ancestor of the O Moores (Siol Morda) Sept in Co. Laois (named for him) in the mid - north - west of Southern Leinster who were to be among the 7 Septs of Laois.
In the new Millennium the territory in what is now Southern Leinster and the Munster Province in the south of Ireland below Dublin was known as 83.Mogha's Half until *83.Conn - of the Hundred Battles the Heremonian Ui Cobhthaigh Ui Felim 110th King of Tara / Ireland who is the direct male line ancestor of all of the Dal Cuinn Septs defeated and killed the Heberian King, 83.Mogha Nuadhat in battle and basically joined Southern Leinster to the Midlands / Midhe / Meath / Northern Leinster creating the whole of Leinster Province reducing the original 5 Provinces / Cuigi to 4. The territory that is now also basically the Munster Province was then held by the Heberian Septs under 83.Mogha's son, 84.Ailill Oluimm who became the 1st King of Munster who was married to 84.Sadhb the daughter of *83.Conn - of the Hundred Battles, but the Heberians never gave up the hope of also regaining the overlordship of Southern Leinster, which they still regarded as being in Mogha's Half.
The aristocratic Gaelic Milesian Heremonian Ui Laoghaire Ui Lughaidh Cu Corb Septs also emanating from *59.Ugaine Mor - the Great the 66th King of Tara / Ireland and one of his sons, *60.Leary / Laoghaire Lorc the Heremonian 68th King of Tara / Ireland and his descendant 78.Lewy / Lughaidh came to dominate in Southern Leinster emanating from his descendant 86.Cu Corb against the interests of the Heberian over lord ship in the north of Mogha's Half. The Heremonian Ui Laoghaire Ui Connla descendants of his brother, 78.Connla were to settle in the south - west of Southern Leinster in Ossory / Co. Kilkenny.
In the 5th Century AD the Heremonian Ui Cobhthaigh Ui Felim Dal Cuinn "southern" Ui Niaill Septs, descended also from *59.Ugaine Mor = the Great through another son, *60.Coffey / Cobhtach the 69th King of Tara / Ireland through his descendants, *81.Toole / Tuathal Teachtmhar the 106th King of Tara / Ireland and *92.Felim / Feidhlimidh the 108th King of Tara / Ireland and more directly through his son, *80.Conn - of the Hundred Battles the 110th King of Tara / Ireland (Dal Cuinn) encroached on the Heremonian Ui Laoghaire Ui Lughaidh Cu Corb northern borders adjacent to the Midlands / Midhe / Meath and decreased their territory there. Meanwhile the Heremonian Cu Corb Septs descending from 78.Lewy / Lughaidh, especially the Cu Corb Ui Cheinnselaig and Ui Dunlainge Septs in Southern Leinster became the most dominant Septs among their Tuatha / Family regions there. Other predominant Septs originally descending directly from 86.Cu Corb were the Dal Cormaic, the Dal Cairpre, the Dal Messin Corb, the Ui Garrchon, Ui Mail, Ui Theig, Ui Chellaig Cualann, Ui Bairrche, Ui Failge, Ui Crimthann Aine, Ui Enechglais, Ui Buidhe, Crioch na Cetach, Ui Drona, Ui Dego, Ui Felmeda, Ui Briuin Cualann, Siol Maeluidir, Siol nEladaig, Fir Thulach Mide, and their original capital was at Naas.
Early on the Ui Cheinnselaig Sept emanating from 94.Enna Cennsalach the Cu Corb 2nd King of Leinster was to be pre - eminent in Southern Leinster, and then the Ui Dunlainge Sept descending from his cousin, 94.Dowling / Dunlaing, a Cu Corb Prince, evolved into a long line of Ui Dunlainge Ui Dunchada, Ui Faelain and Ui Muiredaigh Septs who became a continuous dominant direct male line of Kings of Leinster who were to be eventually also descended from 3 brothers who were Kings of Leinster.
The Ui Cheinnselaig Sept were later on to regain control after nearly 300 years in Southern Leinster, and provide the last few Kings of Leinster before the Anglo - Norman Invasion brought on by 113.Diarmait Mac Murrough na Gall = of the Foreigners who was to be the Ui Cheinnselaig 59th King of Leinster and basically the last of their line.
The aristocratic Gaelic Milesian Heremonian Ui Laoghaire Ui Connla Kings of Ossory in Co. Kilkenny in the south - west of Southern Leinster who were also to be descended directly from *60.Leary / Laoghaire Lorc (Ui Laoghaire) through 78.Connla (Ui Connla), (a brother to 78.Lewy / Lughaidh (Ui Lughaidh) the direct male line ancestor of the Cu Corb dynasty in Southern Leinster), would always be caught between a rock and a hard place. Their kingdom of Ossory / Co. Kilkenny was squeezed between the overlordship in Mogha's Half of the Heberians in the nearby Munster Province, and the the domination of their kinsmen, the numerous Cu Corb Septs in Southern Leinster nearby acting as the Kings of Leinster. They were also subject to the overall domination of the Heremonian Ui Cobhthaigh Ui Felim Dal Cuinn Kings of Tara / Ireland, and later on the marauding Vikings and the Anglo - Norman English spreading out from The English Pale surrounding Dublin, but despite this they were able to produce 1 King of Leinster. The most dominant Families later on in Southern Leinster were to be the Cu Corb O Byrnes, O Dempseys, Kavanaghs, Mac Murroughs, O Phelans / Whelans and O Tooles, the Ui Connla Mheic Gilla Padraig (Fitz Patricks) and the Irian O Lalors and O Moores in Co. Offaly in the mid - north west.
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