Atri or Attri is a Vedic sage, who is credited with composing numerous hymns to Agni, Indra, and other Vedic deities of Hinduism. Wikipedia

Ancient divine sage in India and one of the saptrishis Wikidata

A legendary bard and scholar, one of nine Prajapatis, a son of Brahma, said to be ancestor of some Brahmin, Prajapatis, Kshatriya and Vaishya communities who adopt Atri as their gotra. Atri is one of the Saptarishi (Seven Great Sages) in the seventh, i.e. the present Manvantara. Wiktionary