Gaelic sept

Dempsey

Ó Díomasaigh
Also: O'Dempsey

“descendant of Díomasach, 'the proud'”

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

Quick answers
Is Dempsey an Irish name?

Dempsey is a Gaelic name: it was formed in Irish, from an Irish ancestor, before English was spoken here. In Irish the name is Ó Díomasaigh.

What does the surname Dempsey mean?

Dempsey (Irish: Ó Díomasaigh) means “descendant of Díomasach, 'the proud'”. Origin: Gaelic sept.

Where in Ireland is the surname Dempsey from?

The historic homeland of the Dempsey name is Laois, Offaly. People moved, so the name can be found far beyond it.

What is the Irish for Dempsey?

Ó Díomasaigh. Related spellings: O'Dempsey.

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

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