Mowni was the pen name of Tamil fiction writer S. Mani (1907- 1985). Born at Semmangudi, Mowni, is one of the rare writers of Tamil fiction. He had his high school education in Kumbakonam and lived there for fourteen years, since his marriage.Then he moved to Chidhambaram permanently to look after his family properties.

Mowni had a Bachelor's degree in Mathematics, but he did not take up any job. He was very fond of classical music and he also had very strong exposure to western literature , and showed deep interest in Indian philosophy. His creative power was enriched by his analytical ability obtained through science education, his artistic mind due his love for music, foresight as a result of his deep knowledge in philosophy and literary awareness from his exposure to western fiction.