Ó Teimhneáin
Ó TEIMHNEÁIN—I—O Teynane, O Tyvnane, O Tinan, O Tynnan, Tynan, Tinan, Tynnan, Tivnane, Tivnan, Tevnane, Tevnan, (?) Tivane, Teevan; 'descendant of Teimhneán' (diminutive of Teimhean, dark, grey); (1) an Ossory surname, now common in Leinster and Munster; and (2) a Sligo surname, still extant in Connacht, anglicised Tivnane, Tevnane, &c., but rare.
Alphabetical Index to Irish Surnames