Kings Of Oriel Websites
Clan McMahon of the Kingdom of Oriel
The story of Clan McMahon of County Monaghan Ireland, Kings of Oriel (Airghialla) for 400 years. This site provides a history beginning with the Three Collas in 327 AD, to the rise of MacMahon in 1196, to the demise of Oriel in the war of 1641.
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