Mag Riabhaigh
Mag RIABHAIGH—IV—M'Grevye, M'Greave, Magreevy, Magreavy, MacGreevy, MacGrievy, &c.; a variant of Mac Riabhaigh, which see; the name of a family who were anciently chiefs of Moylurg, in Co. Roscommon.
Alphabetical Index to Irish Surnames