Donnagan is an Irish name, derived from the Gaelic word “donn” which means 'brown or dark'. It was probably a nickname for a dark haired or swarthy person that transferred to use as a given name.
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Donnagan is an Irish name, derived from the Gaelic word “donn” which means 'brown or dark'. It was probably a nickname for a dark haired or swarthy person that transferred to use as a given name.