Mec Vannin
/ˌmɛk ˈvanɪn/noun
(The name of) a Manx nationalist party, established in 1962 and advocating full republican independence for the Isle of Man.
Origin
1960s; earliest use found in Isle of Man Weekly Times. From Manx Mec Vannin, lit. ‘sons of (the Isle of) Man’ from mec, plural of mac son + Vannin, the lenited form of Mannin (Isle of) Man.