The Eblani, whose territory also extended over Dublin and Kildare (Thomond), are mentioned by Ptolemy as being settled in MEATH county. According to the native divisions it formed part of one of the five kingdoms into which Ireland was partitioned, and was known by the name of Mithe, Methe, Media or Midia, perhaps from its central situation. It was afterwards divided into two parts, Oireamhoin, or "the eastern country," which comprehended the portion now known as by the name of Meath; and Eireamhoin, or "the western country," comprehending the present counties of Westmeath and Longford, with parts of Cavan, Kildare, and the King's county. The prince of East Meath was O'Nial, hereditary chieftain of Caelman or Clancolman, who is distinguished in the native annals by the name of the southern O'Nial. The district surrounding the hill of Taragh was originally called Magh Breagh. On this hill, called also Teamor, from Teaghmor, "the great house," was held the general assembly of the states of the kingdom, which met triennially, from a very early period to the end of the sixth century. Here was preserved the Labheireg, or "stone of destiny," on which the monarchs of Ireland were placed at their inauguration, and which, after having been removed to Scotland, was carried away by Edward I, among other trophies of his victory, to Westminster, where it still remains. This part of Ireland suffered severely by the invasions of the Danes.

Northern Co. Louth, eastern Armagh and later in Monaghan. Imchad, the son of Colla Fochríth (one of the 3 Collas) is cited as progenitor of the Uí Méith in the early genealogies. Hanratty (O hInnrechtaigh) were styled as lords of Uí Meith with territory in northern Co. Louth before being pushed into Monaghan (and Fermanagh) by pressure from the Anglo-Normans. The Ua hAnluain (O'Hanlon) sept were cited as chiefs of Uí Meith Tiri, "now the barony of Orior" in Armagh, and O'Dugan (Poems) places them over Oirtheara (Orior).

John O'Donovan in his notes on the Annals of the Four Masters cites, "Ui Meith - There were two groups of this name in the ancient Oirghialla, one called Uí -Meith Macha. alias Ui-Meith Tire, who were seated in the present barony of Monaghan, in the County of Monaghan; and the other Uí -Meath-Mara [Omeath], seated in Cualigne, in the north of the County of Louth." O'Dugan mentions O hInnreachtaigh as a king of Uí -Meith Macha, and the Annals mention them frequently. O hAinbhith, who are also mentioned in the annals as lords of Uí Meith, are given by O'Dugan as lords over noble Uí -Seaain.
The text H. 3, 17, T.C.D. notes the Sogain (of Ulst.?), Uí Echach Coba, Uí Meith Macha and Conaille Murthemne are of the same stock, indicating a possible difference in the genealogy of the Uí Meith Macha and the Uí -Meath-Mara.

An early genealogy of the Uí Méith:   (Book of Ballymote)
Imar m. Muircertaich m. Duibdarac m. Scannlain m. Indrachtaich m. Gairbid m. Ainbeith m. Mailbrigti m. Duibinnracht m. Taidg m. Innreachtaich m. Muiredaich m. Mailimuchair m. Scannlain m. Fingin m. Aedha m. Fiachrach m. Fiachrach m. Eogain m. Briuin m. Muiredaic Meith (a quo H. Meith) m. Imcadha m. Colla Da Crich m. Eachach Doimlen.

In the time of Ptolemy, TYRONE was inhabited by the Scoti, which tribe extended itself over most of the inland regions; though some writers place the Erdini here, as well as in the neighboring maritime county of Donegal. It was afterwards known as the district or kingdom of Cenél Eoghain, frequently called Tyr-Oen, whence its present name of Tyrone is derived. A portion of its southern border embraces the northern parts of the ancient district of Orgial or Uriel. According to Camden it was divided into Lower and Upper, or North and South Tyrone by the Slieve Gallion mountain; but as this range is now wholly included within Londonderry, it is probable that the name of Tyrone was then extended to the greater part of that county also. This district was from the earliest period of the Irish annals the chief seate of the power of the O'Nials, the princes or kings of the country, who traced their origin from Nial of the nine hostages, and several of whom obtained sovereignty over the whole island. In the tenth century, Hugh O'Nial, lord or chief of Tyr-Oenm was solicited by Malachy, King of Ireland, to assist him against Brian Boroimhe, then claiming the rank of King of Ireland, and was offered a large portion of Meath as the reard for his acquiescence. O'Nial of Tyrone was one of the chiefs in Roderic O'Conor's army in his unsuccessful attempt to drive the English out of Dublin.

Cairpre Gabra - northern Co. Longford, barony of Granard,... O'Ronan (Ó Ronáin) were chieftains in the barony of Granard until dispossessed by the O'Farrells in the 13th century.

The annals cite for the general terms Cairpre, Coirpri, et al:

In O'Dugans Topographical Poem he describes Mac Maoiliosa (possibly Mallison, or Mellowes) of Magh Breacraighe in the Breifne portion of his poem. Edmund Hogan described this as a district in northwest county Westmeath (& SE co. Longford), named for an early tribe of the area. O'Hart described it as a district near the borders of Co. Longford and Leitrim. There are various locales given for the name, including the Magh Bregmaine territory about the barony of Shrule in southern co. Longford.

The earliest inhabitants of the tract DUBLIN of whom we have any authentic notice were a native people designated by Ptolemy Blanii or Eblani, who occupied also the territory forming the present county of Meath, and whose capital city was Eblana, presumed on good authority to have been on the site of the present city of Dublin. By some writers it is stated that in subsequent remote ages the part of the county lying south and east of the river Liffey formed part of the principality of Croigh Cuolan; while that to the north was included in the principality of Midhe, or Meath. The Eblani, whatever may have been their origin, probably enjoyed peaceable possession of the soil until the commencement of the Danish ravages, and the seizure and occupation of Dublin by these fierce invaders. At this era, the tract now described experienced its full share of calamities, until the celebrated battle of Clontarf, which terminated in the overthrow of the military power of the Ostmen in Ireland. At the time of the English invasion, a considerable part of the county to the north of the Liffey was wholly in the possession of the Ostmen, and from this circumstance was designated by the Irish Fingall, a name signifying either the "white foreigners," or "a progeny of foreigners;" the word "fine" importing, in one sense, a tribe or family. The country to the south of Dublin is stated, but only on traditional authority, to have been called, at the same period, Dubhgall, denoting the territory of the "black foreigners," from its occupation by another body of Danes. The county once comprised the territories of the O'Birnes and O'Tooles in the south, which were separated from it and formed into the present county of Wicklow, so lately as the yeare 1603.