Ó Damháin
Ó DAMHÁIN—I—O Davan, Davane, Devane; 'descendant of Damhán' (diminutive of damh, a poet). Compare with Ó Daimhín; a rare Ulster surname. MacFirbis mentions a family of the name among the Cinel Eoghain.
Alphabetical Index to Irish Surnames