Sachchidananda Hirananda Vatsyayan, popularly known by his pen-name Agyeya (1911–1987), was a major Hindi writer, poet, novelist, and critic. A pioneer of Prayogvad and Nayi Kavita movements, he explored individual freedom, existentialism, and modern sensibility in works like Shekhar: Ek Jivani and Hari Ghaas Par Kshan Bhar. He won the Sahitya Akademi Award and the Jnanpith Award. He passed away in 1987.