O'Meagher is a surname of Irish origin, often associated with the Gaelic name O'Meagher, which means "descendant of Meagher." The name is linked to the ancient Irish nobility and is primarily found in the province of Munster, particularly in County Tipperary. Individuals with the surname O'Meagher may have historical ties to various regions in Ireland and can be found in records dating back several centuries. The name is sometimes spelled in different ways, reflecting regional dialects and variations in spelling over time.