Agathiyar is one of the Saptarshis who are extolled at many places in the Vedas and a revered Vedic sage and earliest Siddhar. He is also believed to be the author of Agastya Samhita. A-ga in Sanskrit means a mountain, and Asti means thrower. Agastya the Muni, son of Urvashi was born of both Gods, Mitra and Varuna.