Agastya (Sk.). The name of a great Rishi, much revered in Southern India; the reputed author of hymns in the Rig Veda, and a great hero in the Râmâyana. In Tamil literature he is credited with having been the first instructor of the Dravidians in science, religion and philosophy. It is also the name of the star “Canopus”.
Source: H.P.Blavatsky - The Theosophical Glossary