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.
Subsequently, however it was one of the first to be settled by the English in the 1600s.That meant that the old Irish feudal system and traditions continued in Leitrim far longer than in other counties but then disappeared much quicker with the arrival of English settlers.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.The significant social, economic and political shifts that took place during the mid nineteenth century thus had their roots in the changing patterns of land ownership and society in the centuries and decades before.
In 1367 Mac Raghnaill, O'Connor and Mac Tiernan accompanied by a troop of gallowglasses, attempted to take Moylurg in Roscommon but returned without having gained booty or consideration.Larry is from Co Fermanagh and Gus & Michael (NJ) are from Scotland according to their verbal family history.The first identifiable Kernan ancestor of the Utica Kernans is Bryan Kernan, gentleman of Ned, in the parish of Killeshandra, Barony of Tullyhunco, Co Cavan, Ulster.Or were they in fact distinct Mac Tigernain families?O'Farrell's Linea Antiqua describes the line of the Clann Tigernain na Buannaidh as "Mc Ternan Naban," Naban here probably being a corrupt misanglicisation of Na Bunnaidh.Based on the DNA test for 111 Mac Tighernans, it appears that the tested Mc Ternans fall into 19 separate genetic groups.