WEBThe Isle of Man (Manx: Mannin, also Ellan Vannin [ˈɛlʲan ˈvanɪnʲ]) or Mann (/ m æ n / man), is a self-governing British Crown Dependency in the Irish Sea, between Great Britain and Ireland. It is recognized as one of the Celtic nations, and is the homeland of the Manx people, a Celtic ethnic group.