Ó Buachalla is an Irish Gaelic surname, the original form of the anglicized surname Buckley. The name means "descendant of Buachaill", where "Buachaill" is a personal name derived from an Irish word for "cowherd" or "servant" (originally "boy").The Ó prefix indicates "grandson" or "descendant" in Irish patronymic naming traditions, making Ó Buachalla a hereditary surname that passed through generations. The name is historically associated with County Cork, particularly the region of Muskerry, where the family was a sept of the larger Eóganacht dynasties. Over time, the anglicized forms Buckley and Bully emerged as English-speaking officials adapted Gaelic spellings.Today, the surname remains most common in Ireland, though variants like Buckley have spread to the United Kingdom, the United States, and Australian diaspora communities. The original Ó Buachalla spelling is considered a marker of proud Irish heritage and is still used by those who prefer unanglicized forms.Meaning: descendant of Buachaill (cowherd/servant)Origin: Irish GaelicType: Patronymic surnameUsage regions: Ireland, especially County Cork