Mac Dhubhdara
Mac DHUBHDARA, Mac DHUBHDARACH—IV—M'Dwdara, MacAdarrah, MacAdarra, MacDara, Daragh, Darra, Darragh, Darrock, and, by translation, Oak, Oaks, Oakes; 'son of Dubhdarach (the black-man of the oak); also written Mac Dhuibhdara, Mac Dhuibhdarach (which see), and shortened to Mac Dara, Mac Darach, which see.
Alphabetical Index to Irish Surnames