Mag Raillghuis
Mag RAILLGHUIS, Mag RIALLGHUSA—IV—Magriellassy, M'Grealis, MacGrillish, Grealish, (Greely, Grealy, Greally, Griffin); corrupt for Mac Niallghuis, Mac Niallghusa, which see; not uncommon in parts of Connacht.
Alphabetical Index to Irish Surnames