Atropos, one of the Fates

Attica, a state in ancient Greece,

Audhumbla, the cow from which the giant Ymir was nursed. Her milk was frost melted into raindrops,

Augean stables, cleansed by Hercules,

Augeas, king of Elis,

Augustan age, reign of Roman Emperor Augustus Caesar, famed for many great authors,

Augustus, the first imperial Caesar, who ruled the Roman Empire 31
BC—14 AD,

Aulis, port in Boeotia, meeting place of Greek expedition against
Troy,

Aurora, identical with Eos, goddess of the dawn,

Aurora Borealis, splendid nocturnal luminosity in northern sky, called Northern Lights, probably electrical,