Xuthus

In Greek mythology, Xuthus (Ξοῦθος Xouthos) was a Phthian prince who later became a king of Peloponnesus. He was the founder (through his sons) of the Achaean and Ionian nations.

Etymology
According to the author Robert Graves, Xuthus' name came from the ancient Greek word strouthos, meaning "sparrow".

Family
Xuthus was a son of King Hellen of Thessaly and the nymph Orseis; and brother of Dorus, Aeolus, Xenopatra and probably Neonus. He had two sons, Ion and Achaeus, and a daughter named Diomede by Creusa, the Athenian daughter of King Erechtheus. Euripides's play, Ion, provided an unusual alternate version, according to which Xuthus was the son of Aeolus and Ion was in fact been begotten on Xuthus's wife Creusa by Apollo. Xuthus and Creusa visited the Oracle at Delphi to ask the god if they could hope for a child, at which point they are told they already have a child, Ion, who was father by Apollo and mothered by Creusa, though Creusa had forgotten her son due to the trauma of being raped by Apollo. The Oracle at Delphi tells the couple that Ion is Xuthus' son and that Creusa's family should adopt him as Athenian. This makes Creusa so angry she tries to murder her stepson, but she fails. It is at this point the Creusa finds the crib that young Ion slept in and realizes she is his mother. Despite Ion being adopted, Xuthus is proud to be a father and introduces Ion as his legitimate son to Athens. Variation's of Xuthus paternity regarding Ion are that he is the true father, that he has been tricked by Apollo and Creusa, or that he has deluded himself into believing he is the father, but the most common version is that told above with the Oracle of Delphi. Xuthus will later father Dorus and Achaeus with Creusa, though Dorus is normally presented as Xuthus's brother.

Mythology
According to the Hesiodic Catalogue of Women on the origin of the Greeks, Hellen's three sons Dorus, Xuthus (with his sons Ion and Achaeus) and Aeolus, comprised the set of progenitors of the major ancient tribes that formed the Greek nation.