Ó hUaithnín
Ó hUAITHNÍN—I—O Hownyn, O Hunnyn, Houneen, Huneen, Honeen, Oonin, Green, Greene; 'descendant of Uaithnín' (diminutive of uaithne, green); written Ó hUainidhe by Keating; the name of a Dalcassian family in Thomond; now very often anglicised Greene, by translation.
Alphabetical Index to Irish Surnames