I don't yet have definitive proof but if memory serves he also described the line of the Clann Tigernain na Corradh as Mc Ternans as well." [end of Loughlan's comments] It is written in Irish history, that the Mc Ternans of Bréifne decend from both The O'Rourkes who were kings of Drumahaire, Co Leitrim and Tiernan, grandson of Turlough Mor O'Connor, past king of Ireland who lived in north Co Roscommon.
The DNA test that 111 Mac Tighernans took proved that both The O'Rorke and the O'Connor Don are not linked genetically to us.
By 1641, however, the family had even lost this possession, for, in that year, John mac Kernan was one of the gentlemen who led the rebels in a siege of Croaghan then occupied by Sir James Hamilton.
West Bréifne covers north Co Leitrim and the two baronies in Co Cavan, Tullyhunco and Tullyhaw.
Lorcan O'Runai in his book "From Rosclogher to Rooskey" list the more well known families of North Leitrim.
The ancient principalities of North Leitrim were chiefly Dartry, Tullyhaw and Tullyhunco, Dromahaire, Cineal Luachain, Clannfearnmaigh (Glenfarne) and Muintir Kenny lying between Lough Allen and Co Roscommon.
Moylurg was the name of a kingdom located in the north-east of Connacht, the western province of Ireland, from c.956-1585.
The Kings of Moylurg were a branch of the Sil Muiredaig, who were themselves of the Ui Briuin who descended from The Connachta.Of these families, only the Mac Tigernains of Tellach Dunchadha in the barony of Tullyhunco in Co Cavan are easily identifiable, since they appear prominently in the annals of Ireland.The territory of the Meg Tigernains of Clann Ferghail is now unknown; but since they appear in O'Dugan's Topographical Poem in both the territories of the Cenel Conaill and the Airgiallaigh, it is likely they held lands along the Donegal-Fermanagh border.Sometime before 1622, the family had lost ownership of this property, probably supplanted by Scotsmen in James I's Plantation of Ulster.Nonetheless, at the time of his death in that year, the Mac Kernan who was called "Brien bane" [Blond Brien] was still in possession by demise from James Craig who had been granted it by James Auchmuty.Based on the DNA test for 111 Mac Tighernans, it appears that the tested Mc Ternans fall into 19 separate genetic groups.