The Uí Echach of Oirgialla, in Tuath Echach, comprised the barony of Armagh, in modern county Armagh, as suggested by Leabhar na gCeart and by O'Donovan's edition of Topographical Poems of O'Dugan and O'Heerin). The Uí Echach bega and the Uí Echach móra, of Síl Colla Focrích (the race of Colla-dá-chrich), from MacFirbis and the Book of Ballymote, may relate to this reference and region. The text H. 3, 17, T.C.D. however place these in Dalaraide, perhaps a reference to Uí Ethach Cobha. Other northern septs: The Uí Echach na hÁrda, of the ards of county Down, are given in descent from Eochaid Gunnat in the Book of Leinster. The Cinel-Eachach are noted by Seamus O Ceallaigh in the Airghiallian kingdom of Uí Fhiachrach of Ard Sratha (Ardstraw, Co. Tyrone). The Cenél Echach ín chodaig are noted (in H. 2, 7, T.C.D.) as a branch of the Bredcha (Brédach) in descent from Eochaid mac Eogain.

The Cenél Cormaic were also noted in Maenmaigh (descended from Cormac, son of Eoghan, son of Niall?). The genealogy of Uí Corpmaic Maenmhuighe is cited by O'Clery, in descent from corpmaic m Cremhthainn m Bresail m Maine mhoir (a quo Uí Maine). O'Hart cites O'Donchadha, or O'Donoghoe, were chiefs of Clan Cormaic, a district in Maenmoy in Galway. Maenmagh - aka Maonmag or Moenmoy, a territory round Loch Reagh, co. Galway. Maonmuighe or Maenmoy is described as an extensive plain comprising a great part of the present baronies of Loughrea and Leitrim in the county Galway. O Neachtain (O'Naghten, O'Naughton) and O Maolalaidh (O'Mullally) were noted as chiefs in this region prior to the Anglo-Norman invasion.

Ui Fiachrach Finn - descended from Fiachra Finn, grandson of Maine Mór (a quo Uí Maine), this tribal name was noted in Moenmoy, county Roscommon (Tribes and Customs of Hy Maine, ed. O'Donovan). O Neachtain (O'Naghten, O'Naughton) and O Maolalaidh (O'Mullally) were noted as chiefs in this region prior to the Anglo-Norman invasion. John O'Dubhagain in his Topographical Poems cites the sept of "O hEirc, over Uí -Fiachrach Finn," a reference to the territories of Airghialla (North Ireland). The sept of O hEirc, chiefs of Hy-Fiachra Finn, were noted by O'Hart in the barony of Massarene, modern co. Antrim. The Leabhar na gCeart cites Uí Fiachrach Finn in and around the parish of Ardstraw in county Tyrone, an area which has been equated with the Uí Fiachrach Arda Srátha (Ardstraw). There are other references to Uí Fiachrach in the Airgialla region, for example the Síl Ciarain of Uí Fiachrach are noted of Dún Da Én in Dail Araide and Síl Ciarain Ua nEchach of Airthir in Ulster (Book of Lecan).

An alternate genealogy of Uí Fiachrach Finn (in O'Clery): Amlaibh m. Mail sechloinn m. Amalgaid m. Concobair m. Ferghusa finn m Flaithbertaigh m. Fintain m Aedha m. Neachtain (a quo .h. Neachtain) m. Mail chierr m. Ferghusa (ag comraqicit et .h. Mail faladh) m. Oilealla m. Tnuthgaile m. Morlaqoich m. Con dalaigh m. Amhalgadha m. Fiachra finn m. Bresail m. Maine mhoir m. Echach fir da giall m. Domhnaill m. Iomchadhhae m. Colla fo crith.

An early genealogy of Uí Fiachrach Find (in Rawlinson): Flannacán m. Néill m. Ferchair m. Maclaích m. Condálaich m. Amalgada m. Deinmedaig m. Dímmae m. Laidgneáin m. Máelhuidir m. Áeda m. Fínáin m. Amalgada m. Fiachrach Find m. Bresail m. Maine Mor.

Maenmagh - aka Maonmag or Moenmoy, a territory round Loch Reagh, co. Galway. Maonmuighe or Maenmoy is described as an extensive plain comprising a great part of the present baronies of Loughrea and Leitrim in the county Galway. O Neachtain (O'Naghten, O'Naughton) and O Maolalaidh (O'Mullally) were noted as chiefs in this region prior to the Anglo-Norman invasion. The Cenél Cormaic were also noted in Maenmaigh (descended from Cormac, son of Eoghan, son of Niall?). The genealogy of Uí Corpmaic Maenmhuighe is cited by O'Clery, in descent from corpmaic m Cremhthainn m Bresail m Maine mhoir (a quo Uí Maine). O'Hart cites O'Donchadha, or O'Donoghoe, were chiefs of Clan Cormaic, a district in Maenmoy in Galway.

Clann Flaitheamhail - a district in the barony of Moycarn, county Roscommon, its chief was Mac Gilli Enáin (Book of Lecan). O'Hart states the MacGiolla Fionnagain or O'Finnegan, and the Ó Cionnaoith or O'Kenny, were chiefs of Clan Iaitheamhaim or Flaitheamhain, called also Muintir Cionaith, a district in the barony of Moycarnon, county Roscommon