Where does the surname Corcoran originate?

The surname Corcoran is of Irish origin, derived from the Gaelic name "Mac Corcra," which means "son of Corc," where "Corc" is a personal name meaning "dark." The name is primarily associated with the province of Munster in Ireland, particularly County Kerry and County Limerick. Over time, variations of the surname have emerged, such as "O'Corcoran" and "Corcoran," reflecting its historical and regional usage.