Aryenis of Lydia was, according to Herodotus, the daughter of King Alyattes of Lydia and the sister of King Croesus of Lydia.
Aryenis was also the Queen consort of Astyages, King of Media and mother of Mandane of Media and a probable Amytis, married to her nephew Cyrus the Great. She was also mother-in-law of Cambyses I of Anshan and maternal grandmother of Cyrus the Great.
She was given in marriage to Astyages to seal a treaty between Cyaxares of Media and Alyattes II of Lydia, following the Battle of the Eclipse.
Herodotus identified her as the mother of Mandane, but there is speculation that Mandane (the wife of Cambyses I of Anshan) may have been born to an earlier wife of Astyages.