Ἄλπειος
From LSJ
ἔγνω δὲ φώρ τε φῶρα καὶ λύκος λύκον → the thief knows the thief and the wolf knows the wolf, and thief knows thief and wolf his fellow wolf, set a thief to catch a thief
Spanish (DGE)
-ον
1 neutr. sg. y plu. los Alpes Ἄλπειον ὄρος App.Gall.2, τὰ Ἄλπεια (ὄρη) D.S.5.25, D.H.1.41, App.Hisp.13.14, Gall.13, St.Byz.
2 masc. οἱ Ἄλπειοι los alpinos, los habitantes de los Alpes St.Byz.s.u. Ἄλπεια.