Ó hEachthigheirn
Ó hEACHTHIGHEIRN—I—O Haghierin, O Hagherne, O Haherne, O Hearne, Ahearn, Aherin, Aherne, Ahern, Hearne, Hearn, &c.; 'descendant of Eachthighearn' (horse-lord); also written Ó Eachthigheirn, Ó hEachthighearna, Ó hEichthigheirn, &c; a common surname in Cork and Limerick, where it is generally anglicised Aherne, and in Waterford, where it is made Hearne. For history of family, see Ó Eachthigheirn.
Alphabetical Index to Irish Surnames