Lewis & Short

Aetnaeus, a, um, adj. [Aetna].

  1. I. Pertaining to Ætna: ignes, Cic. N. D. 2, 38: fratres, the Cyclopes who forged in Mt. Ætna, Verg. A. 3, 678: fulmen, Prop. 4, 16, 21: Deus, i. e. Vulcan, who is said to have had his forge in Mt. Ætna, Val. Fl. 2, 420.
    Subst.: Aetnaei, ōrum, m., those who dwell on or near Mt. Ætna, Just. 22, 1.
    Hence,
  2. II. Poet., pars pro toto, Sicilian: triumphi, Sil. 9, 196.