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Scope== Gildea is an Irish surname coming from the Gaelic Mac Giolla Dhe - son ( mac ) of the servant ( giolla ) of God ( dhe ).The surname is concentrated in Donegal and Mayo, but is also commonly found down the west coast in Galway and Clare. There is a Ballykilladea in Galway and a Ballykildea in Clare.There have been suggestions that the name ultimately has its origins in the English Beniso...