Aryenis (Ancient Greek: Αρυηνις, romanized: Aruēnis; Latin: Aryenis) was, according to Herodotus, the daughter of King Alyattes of Lydia and the sister of King Croesus of Lydia.
[1] The name Aryenis comes from the Latin transliteration of the Ancient Greek Aruēnis (Αρυηνις), which was itself the Hellenised form of a Lydian name cognate with the Hittite term arawanni- (𒂖), which meant "free", that is a free person, as opposed to an enslaved or unfree person.
[2][3] Following the Battle of the Eclipse, was married to Astyages, son of the Median king Cyaxares as part of a diplomatic marriage to seal a peace treaty between Cyaxares and Alyattes.
Aryenis became the Queen consort of Astyages when he succeeded Cyaxares.
[4] Herodotus does not clearly identify her as the mother of Mandane (the wife of Cambyses I of Anshan)[5] and there is speculation that she may have been born to an earlier wife of Astyages.