Perses (brother of Aeetes)

In Greek mythology, Perses was the brother of Aeetes (which makes him a son of Helios, persumably by Perse the Oceanid). He usurped the throne of Colchis from his brother, but was subsequently slain by Medea, his paternal niece. He is not to be confused with the Titan known as Perses, who is known for fathering Hecate.

...
Wikipedia