leathach

Leathach is a surname of Irish origin. It is an anglicized form of the Gaelic surname Ó Leathartaigh, meaning "descendant of Leathartach." The personal name Leathartach itself is thought to derive from the Gaelic word "leath," meaning "half" or "side." Historically, the Ó Leathartaigh clan was prominent in the region of Tír Conaill in County Donegal, in the northwest of Ireland. Members of this clan held significant positions and lands in that area for centuries. As with many Irish surnames, variations in spelling have occurred over time due to anglicization and phonetic transcription. The surname Leathach is relatively uncommon and is primarily found in Ireland and among the Irish diaspora.