Upon his release a few months later, he slew three sons of Muirchertach Ó Mathghamhna, plundering his land, and seizing the territory between Kinelmeky and Ivagha, thus divided the O'Mahony septlands into two disconnected areas.
[4] There on the southwestern coast of Munster he established the small, semi-independent kingdom of Carbery and acquired the additional sobriquet of Domhnall Cairbreach.
[citation needed] Domhnall Got left six sons:[3] The McCarthy Y-DNA Surname Study has done extensive work researching and documenting the genetic origins and evolution of the MacCarthy septs.
[7] Thus, while many participants of the study have been shown to descend from Domhnall Got, some belong to different branches, including those currently postulated to be Clann Tadhg Dall, MacCarthy Reagh and Sliochd Feidhlimidh.
The MacCarthy Reagh contingent include the subsepts of Farshing [Fairsing], Rabagh [Rábach], Tallin (aka Tollin) and Tullach.