Curran (Irish: Ó Corráin) is an Irish and also a Scottish surname.
The Irish is now found in County Waterford but originates in East County Cork, where the Ó Corráins were a major branch of the ruling dynasty of the ancient Uí Liatháin kingdom.
The two most prominent septs of the Uí Liatháin were the following:
Uí Meic Caille
The Uí Meic Caille (Uí Maic Caille), who gave their name to the Barony of Imokilly, took their name from Meic Caille, son of Meic Brócc, son of Eochu Liathán.
* Uí Anmchada ( Lane, Lyons, Lehane) * Uí Glaissín (Glashan, Gleason, Gleeson) * Uí Charráin (Ó Corráin, Curran)
These were the descendants of the aforementioned Ailill Tassach, son of Eochu Liatháin.
* Uí Meic Tire (Ó Mic Thíre, Mictyre, MacTyre, MacTire, Wolfe, Woulfe)