The O Reillys are thought to be kinsmen of the O Conor kings of Connacht through Maolmordha (Myles), whose great grandson was Ragheallach (gregarious race), from who the O Reillys took their name. Their territory was around Lough Oughter in Cavan and as they increased they extended their families and their territory, particularily to Westmeath
Areas of Origin for REILY
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