While browsing through a book called Pittsburgh and Pennsylvania Genealogies (Fragmenta genealogica hearldica), I came across this valuable tidbit detailing the lineage of the Irish nation back to Adam and Eve, the progenitors of all people.
The list titled "The Stem of the Irish Nation from Adam down to Milesius of Spain, Showing the Descent of O'Leary", begins at Creation, generation 1, as follows:
Adam
Seth
Enos
Canaan
Mahlaleel
Jared
Enoch
Methusaleh
Lamech
Noah
Japhet
Magog
Baoth
Pheniusa Farsaidh [Fenius Farsa]
Niul
Gaodhal
Asruth
Sruth
Heber Scut
Beouman (King of Scythia)
Ogaman (King of Scythia)
Tait (King of Scythia)
Agnon
Lamhfionn
Heber glunfionn
Agnon Fionn (King of Galacia)
Febric Glas (King of Galacia)
Nenurall (King of Galacia)
Nuadhad (King of Galacia)
Alladh (King of Galacia)
Arcadh (King of Galacia)
Deag (King of Galacia)
Brath (King of Galacia)
Broghan (King of Galacia, Andalushia, Murcia, Castile and Portugal)
Ithe
Lughaidh
Mal
Adaman
Logha
Mathsin
?
Gossaman
Adaman
Heremon
Logha Feile
Lachtnan
Nuaclad Argni
Deargthine
Deagha Derg
Deagha Amhra
Ferulnigh
Sithbolg
Daire
Each-Bolg
Ferulnigh
Daire
Luy
MacNiadh, married Sabina, daughter of Conn of the "Hundred Battles"
Luy MacCon Tobhash Canaan, the fifth son of Luy MacCon, A.D. 195, the 113th Monarch of Ireland was the ancestor of O'Laeghaire anglicised O'Leary and Leary.
Fobhach Canaan, his son
Duach
Treana
Eirc
Ros
Laeghaire, his son, a quo O'Leary
Fiach
Dunlang
Ros
Main
Aongus (or Eneas)
Earc
Conon Cliodhrn
Teige
Donoch Na Tuaima
Conamnan
Dermod
Cumumham
Donoch
Teigh
Maolseaghlainn
Teigh
Maolseaghlainn
Tomhas Mor
Tomhas Oge
Athbriadh
Cummuhan
Amhailgadh
Dunlang
Art
Teige
?
Conogher O'Leary, his son, first assumed this surname
Donogh, his son, married to Ellen, daughter of Dermod O'Crowley, died Jan. 4, 1637
Amhailgadh (or Auliff O'Leary) had a brother named Conogher
The book is loaded with facts about the Irish and other interesting information.
Can you add to this list? Corrections welcome!