An Atreya (आत्रेय) is a descendant of Atri, one of the great Hindu sages (rishis) whose accomplishments are detailed in the Puranas.
The descendents of Atri Rishi use Atreya as their surname just like many other Gotras, or clan names used by the Brahmin community of Hindus in India and Nepal. In Northern India, most Atreya Bhramins also prefer to use the Tyagi surname.
Original Atreya gotri bramhin have migrated to East Indian state of Orissa which was in the ancient time known as Kalinga, Utkala/Utkal, South Kosal, Kongada, Odra Desha etc. All Oriya/Utkal Brahmins with surname Rath have only Atreya gotra.
