The surname Duffy, the anglicized form of O'Dubhthaigh, is a personal name derived from the Gaelic word dubh, meaning black or swarthy. While the name is widespread throughout Ireland in different forms, the original homeland of the Duffy clan was Monaghan. Duffy appears most often in the 18th century list of clergy compiled for that county in accordance with the Penal Laws. In … [Read more...] about Roots: Duffy, Duhig, Dowey and Doohey