An alternative spelling of Etna, a volcano in eastern Sicily.
The names of the three brigs Aetna appear more frequently as Etna (q.v.).
The first Nausett (q.v.)—a Cosco-class light-draft monitor commissioned on 10 August 1865—was renamed Aetna on 15 June 1869, but resumed the name Nausett on 10 August 1869.