Costello Coat of Arms, Family Crest and Costello Family History

If you are conducting some Costello family history research then you can view the Costello 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 Costello surname history and will help you answer the question 'what is the meaning of my name?'


The name Costello in Ireland is of Anglo-Norman origin deriving from the de Nangle family who were based in the Province of Connaught. The family adopted the Gaelic name Mac Oisdealbhaigh and the Sept name eventually became anglicized as Costello. The majority of descendants can still be found in the West of the country.

A Sept or Clan is a collective term describing a group of persons whose immediate ancestors had a common surname and all inhabited the same lands.

Meaning of Symbols & Colors on the Costello Coat of Arms

Azure/Blue Represents Loyalty and Truth.
Or/Yellow/Gold Represents Generosity.
Lozenge Denotes Honesty and Constancy
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by Michael Green

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