Erin is a given name of Irish origin, derived from the anglicized form of the Gaelic name Éirinn. It is a variant of the name Eireann, which means 'PEACE'. The name ERIN is often used as a unisex name, but is more commonly given to females. Moran and Gray are both surnames of Irish origin, with Moran being derived from the Gaelic word 'O'Morain' meaning 'descendant of Morann', and Gray being derived from the Old English word 'græg'.