Osullivan-mor Coat of Arms, Family Crest and Osullivan-mor Family History

If you are conducting some Osullivan-mor family history research then you can view the Osullivan-mor coat of arms and the name meaning and origin of the name as well as the meaning of symbols below. This is a great place to start when tracing your genealogy and Osullivan-mor surname history and will help you answer the question 'what is the meaning of my name?'


Together the names Sullivan and O'Sullivan rank as the third most frequently found in Ireland. There were two main Septs with this name. The O'Sullivan Mor Sept was based in County Kerry and the O'Sullivan Beare Sept was based in County Cork. It is mainly in these two Counties that the majority of descendants can still be found.

A Sept is an ancient Clan-like collective describing a group of persons whose immediate ancestors bore a common surname and inhabited the same territory.

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by Michael Green

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