in Kneens placenames (www.manxnotebook.com/fulltext/pn1925/pk.htm)he has
Carnageay .
This name is usually translated 'Cairn of the wind', it is more probably a corruption of the ancient treen name. v. Arnycarnigan.
The No 2 might refer to a house or to a mineshift but in Lamplugh's listing of mines there does not appear any similar name