Recorded in several spelling forms including Gaughan, Gavan, Gavaghan, Gavahan, Gavaran, and even Gahan, this notable surname is Irish. Originally it was exclusive to the province of Connacht, and specifically County Mayo, which remains the epi-cntre of the name. The derivation is from the pre 10th century Old Gaelic O'Gaibhtheachain, meaning the male descendant of the fierce warrior! Traditionally, Irish family names are taken from the first chief of the tribe, who was usually an illustrious warrior, literally the case here.
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