In Greek mythology, Anthas or Anthes (Ancient Greek: Ἄνθας, Ἄνθης, romanized: Ánthas, Ánthes) was a son of Poseidon and Alcyone,[1] and brother of Hyperes. The brothers were eponymous founders and first kings of the cities Hyperea and Anthea in a region they reigned over; later on these two cities were merged into the historical Troezen.[2] Anthas was father of at least two sons, Aëtius and Dius,[3] of whom Aëtius was the successor to both his father and uncle, and further co-ruled with Pittheus and Troezen.[2] The descendants of Anthas through Aëtius reputedly founded colonies in Caria: Halicarnassus and Myndus,[4] and accordingly the people of Halicarnassus were referred to by the poetic epithet Antheades 'descendants of Anthas'.[5] Alternately, Halicarnassus was founded by Anthas himself.[6] Anthas also was the presumed eponym of Anthedon, over which he was said to have reigned,[1] and of Anthana in Laconia.[7]