Demaratus in the context of "Ariston of Sparta"

Ariston (Ancient Greek: Ἀρίστων) was a king of Sparta, 14th of the Eurypontid kings, son of Agasicles, and contemporary of the Agiad king, Anaxandrides II. He reigned from approximately 560 BC to shortly after 510 BC. There are two main sources for him, Herodotus and Pausanias.

Of his military or political activities we are told nothing.  He is known for Bering legal father of his successor, Damaratus, who was later deposed on suspicion illegitimate. As Herodotus told it, Ariston had married twice, but neither wife had borne him a child. He had a close friend named Agetus who had an exceedingly beautiful wife, and Ariston, having fallen in love with her, connived to trick his friend into trading this woman for anything among his belongings that Agetus might choose. Once married to her, she became pregnant, and a son was later born – but after 7 months.