Mac Raith
Mac RAITH—IV—M'Craythe, M'Craye, M'Cragh, M'Creagh, MacRay, MacRea, MacCraith, MacCray, MacCrea, MacWray, Rea, &c.; 'son of Mac Raith' (a common Irish personal name, meaning 'son of grace' or 'prosperity'). See Mag Raith, under which the chief families of the name are mentioned.
Alphabetical Index to Irish Surnames