Ātreyāyaṇi (Atreyayani) is one of the ṛṣi-vaṁśas (rishi-vamsa; genealogical line or disciple-cult of rishis) belonging to the gotra (clan) of Sage Aṇgirā (Angira). They are also known as Āngirasa (Angirasa), since they come of Aṇgirā — genealogically , or through the line of disciples.