<. In 1817 Gov. L; cf. Walde, Alois, "Lateinisches etymologisches Wörterbuch," 3rd. ed., vol. 1, p.87; Ernout, Alfred, and Meillet, Alfred, “Dictionnaire étymologique de la langue latine,” 2nd. ed., p.94. Or perhaps the connection is more ancient, and from PIE root *aus- “to shine,” source of aurora, which also produces words for “burning,” with reference to the “hot” south wind that blows into Italy. Thus auster “(hot) south wind,” metaphorically extended to “south.”
Capital of Australia, located in southeastern Australia.