Costello
“son of Oisdealbh — the first Norman family to take a 'Mac'”
The sept's historic heartland, highlighted. People moved — a name can be found far from home.
Is Costello an Irish name?
Costello is a Gaelic name: it was formed in Irish, from an Irish ancestor, before English was spoken here. In Irish the name is Mac Oisdealbhaigh.
What does the surname Costello mean?
Costello (Irish: Mac Oisdealbhaigh) means “son of Oisdealbh — the first Norman family to take a 'Mac'”. Origin: Norman-Gaelic.
Where in Ireland is the surname Costello from?
The historic homeland of the Costello name is Mayo, Galway. People moved, so the name can be found far beyond it.
What is the Irish for Costello?
Mac Oisdealbhaigh. Related spellings: Costelloe.
Looking for the Costello family crest? Read this first — arms belong to people, not surnames, and the honest version is more interesting. Tracing Costello ancestors? The step-by-step guide.
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