Aethra or AETHRA may refer to:

• Aethra (Greek mythology), a number of different characters in Greek mythology
• Aethra (crab), a genus of crabs in the family Aethridae
• AETHRA Componentes Automotivos, a Brazilian auto testing company
• Aethra, a fictional moon in the Colony Wars franchise
• 132 Aethra, an M-type main-belt asteroid
• The Aethra Chronicles, A 1994 MS-DOS Computer Role Playing Game, produced by Michael Lawrence

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