Ó hUaruisce
Ó hUARUISCE—I—O Horiske, Hourisky, Horisky, Waters, Watters, Coldwell, Caldwell, &c.; a corruption of Ó hUarghuis, which see; popularly supposed to be derived from 'fuar,' cold, and 'uisce,' water, and so 'translated' Waters, Coldwell, &c.
Alphabetical Index to Irish Surnames