Theras () was a regent of Sparta, a son of Autesion and the brother of Aristodemos' wife Argeia, a Cadmid of Theban descent. He served as regent for his nephews Eurysthenes and Procles.
The island of Thera (now Santorini) was named for Theras who, with fellow Spartans, colonized the island.Harry Thurston Peck, Harpers Dictionary of Classical Antiquities (1898), Theras
Sources Herodotus, Histories, 4.147-148 Pausanias, Description of Greece, 3.1.6-7, 3.15.6, 3.15.8
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