Morgan is an Irish surname that is derived from the Old Welsh morcant meaning "sea-bright". The majority of Irish Morgans are almost certainly of Welsh or Welsh Norman stock. The surname is common in Connacht and Leinster, but most numerous in Ulster. Here, it is possible that some are descended from the Clann Morgunn of Sutherland in Scotland, or from a separate family based in Aberdeenshire. There is also a Gaelic Irish family in Ulster, the O Murchain, who were based in Co. Monaghan, whose surname was anglicised Morgan.