Clan Mac Aodhagáin - Uí Maine

Mac Aodhagáin - Uí Maine - R-BY198 Egan / Keegan and name variants.
  • 26 members
Administrators
  • Colin Keegan
  • peter keegan
  • Simon Keegan

About us

DNA testing has determined the genetic origins of the Clann MacAodhagain (Keegan, Egan, McKeegan, Eagan etc) to be R-M222 > R-DF104 > A18726 > R-BY198.

R-M222 (known popularly as 'Niall of the Nine Hostages DNA' but actually dates back around 3,000 years) is a Goidelic (Irish/Celtic) haplogroup.

Downstream of this is R-DF104 which dates back to around 100AD and represents the Connachta (the dynasty founded by the likes of Tuathal Techtmar and Conn of the Hundred Battles). The Connachta includes the Ui Maine, the Ui Niall and the Ui Briunn among other Tuatha (tribes).

Downstream of R-DF104 is A18726, which indicates the Ui Maine. This has a further sub-group R-BY198 from which the Clann MacAodhagain descent. 

Tibor Feher, administrator of the Family Tree DNA Hungarian Magyarm Slovakia and R1B-U152 projects in Budapest, Hungary wrote a paper called “High Resolution Paternal Genetic History of Ireland and its Implications for Demographic History”. Under the heading of R1b-L21>DF13>DF49>M222 he writes: “Genetic genealogy research has connected it to families belonging to the Connachta, including the Ui Neill. However this group is earlier than either Niall of the Nine Hostages and can go back to the legendary Tuathal Techtmar.”

Under the heading of the Connachta and O’Neill he adds: “Thorough genetic analysis leads to the identification of the M222 common ancestor with Tuathal Techtmar of the 1st Century.” He presents a family tree in which he identifies the “MacAodhagain (Egan/Keegan) Brehons of Connacht” as sitting under A18726 > BY198 > Y66755 parallel to the other Ui Maine clans of Dunn and Larkin.

The Dál Cuinn genetic genealogy project has done much to determine the Connachta as R-DF104. They write: "Y-DNA results that we have seen so far indicate that the R1b-DF104 phylogenetic node is the starting clade (Y-haplogroup) of the Dál Cuinn. This conclusion is based on the numerous Connachta surnames in the publicly available R1b-DF104+ test results that genetically correlate with the traditional genealogies for the most part. As of December 2018 A.D., there are almost 1000 known R1b-DF104+ men. This assumption of the R1b-DF104 clade being the starting point for the Dál Cuinn does eliminate two dynasties long attributed as part of the Dál Cuinn: the Uí Maine and the Clan Colla."

Further identification of the Clann MacAodhagain is possible through the ancestry of modern testers whose Big Y results correspond to the main septs of the ancient Clann MacAodhagain. These include: 

Paternal descent from Aedhagain and founding clan chiefs: 

Sept A: Cork and Kerry R-BY198 > R-FGC40502 > R-FT118436
Sept B: Tipperary R-BY198 > R-FGC40502 > R-FT115299
Sept C: Clare R-BY198 > R-FGC40502 > Y66755  
Sept D: Westmeath (Tethbae) R-BY198 > R-FGC40502 > Y66755 > R-Y195212 
Sept E: Sligo > Mayo R-BY198
Sept F: Galway R-BY198
Sept G: Roscommon R-BY198 > R-FGC40502 > Y66755 > R-BY11689
Sept H: Longford R-BY198 > R-FT94609

Group I: Close Ui Maine and Ui Briunn kin who adopted the MacAodhagain name but may be descended from a different Aedhagain 
Group J: Haplogroup predicted but not confirmed 

Other lines:

Group K: Keegan/Egans who do not descend from R-BY198
Group L: Ui Maine kin from other clans such as Lorcan, Dunn, Curley and Coleman.
Group M: Descended from MacAodhagain but on maternal lines 


 


 

 



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