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The Mac Darcy clan ruled Kincluachain which comprised the present parish of Oughteragh at the foot of Slieve an Iarainn, and the Mc Clancy ruled Dartry, the present Barony of Rosclogher.
While the Barony of Tullyhunco or Teallach Donnchadha as it was called in Co Cavan, Ulster is the histroical seat of the Mc Ternans, the earliest known member of my Mc Ternan family line came from the Townland of Sheskin, Killargue Catholic parish, Killarga civil parish, Barony of Drumahaire, PLU of Manorhamilton, County Leitrim.
In his second book, "Families in Ireland at the beginning of the 17th century" he list only the Mc Tiernans without the title Lord in Co Cavan.
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.
Based on the DNA test for 111 Mac Tighernans, it appears that the tested Mc Ternans fall into 19 separate genetic groups.
The 111 Mac Tighernans are from eleven countries and five continents from around the world.