來自古愛爾蘭語Manu,即Isle of Man.該島為英格蘭與愛爾蘭之間的海島。Manu在古愛爾蘭語里有海神之意，即海神保佑的島嶼。同時，也有學者認為該詞本身意為島，來自PIE*men,突起，升起，詞源同mountain,eminent.即海上升起的山，島嶼。
英文詞源
Manx
1798, earlier Manks (1620s), metathesized from Maniske (1570s) "of the Isle of Man," from Old Norse *manskr, from Man (from Old Irish Manu "Isle of Man") + suffix -iskr "ish." Manx cat, without a tail, first attested 1843.