Gaelic sept

O'Dea

Ó Deághaidh
Also: Dea, Day, Dee

“descendant of Deághaidh, a tenth-century chieftain”

The sept's historic heartland, highlighted. People moved — a name can be found far from home.

Quick answers
Is O'Dea an Irish name?

O'Dea is a Gaelic name: it was formed in Irish, from an Irish ancestor, before English was spoken here. In Irish the name is Ó Deághaidh.

What does the surname O'Dea mean?

O'Dea (Irish: Ó Deághaidh) means “descendant of Deághaidh, a tenth-century chieftain”. Origin: Gaelic sept.

Where in Ireland is the surname O'Dea from?

The historic homeland of the O'Dea name is Clare. People moved, so the name can be found far beyond it.

What is the Irish for O'Dea?

Ó Deághaidh. Related spellings: Dea, Day, Dee.

Looking for the O'Dea family crest? Read this first — arms belong to people, not surnames, and the honest version is more interesting. Tracing O'Dea ancestors? The step-by-step guide.

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