Mac Dháil Re Dochair
Mac DHÁIL RE DOCHAIR—IV—M'Callredocker, M'Calradocker, M'Gallredocker; 'son of Dál re dochair' (an Irish designation); the name, in the 13th and 14th centuries, of followers of O'Donnell; in the 16th, peculiar to Roscommon; now either obsolete or changed into some other form, such as Ó Dochraidh, or Mac Giolladeacair, which see.
Alphabetical Index to Irish Surnames