"Ayu went eastwards, the Kuru-Pañcalas and Kasi-Videha are (his descendants) the Ayavas; (And) Amavasu (went) westwards, the Gandharas, Parsus and Arattas are (his descendants) the Amavasyavas."
January 1, 1970
https://en.wikiquote.org/wiki/Baudhayana_Shrauta_Sutra