Dugal is a surname with multiple origins. In some cases it is derived from the Gaelic personal name Dùghall (variously spelt), or else from a reduced form of the surname MacDougall (which is an Anglicised surname originating from a patronymic form of Dùghall, Dubhghall, and etc.). The Gaelic Dùghall and Dubhghall are composed of elements dubh a...