Thanjai N. Ramaiah Dass is an Indian poet and script writer who wrote mainly in the Tamil language. He has written more than 500 lyrics for Tamil films.
Born to Narayanasamy and Pappu at Manampoochavadi in Thanjavur district, he had his primary and secondary education at St. Peters Higher Secondary school in Thanjavur. Then he graduated as a Pulavar from Karanthai Thamizh Sangam. He was trained as a teacher.
He wrote a book titled Thirukural Isai Amudham in 1962. The book was released by M. G. Ramachandran who was the President of the South Indian Artistes Society at that time.
The Government of Tamil Nadu paid ₹600,000 to his family and made his works as public property.
In 1952, a young man, Jesudoss was introduced to Ramaiah Dass. He made the young man as his assistant and christened him as Aroordas. (Jesudoss was from Thiruvarur.) Aroordas later turned out to be a most popular writer in Tamil films.
Ramaiah Dass had two wives - Thaayaarammal and Ranganayagi. He had a daughter, Vijayarani and a son, Ravindran from each wife. Ravindran is an Editor in Prasad Lab while Vijayarani is a housewife.
Ramaiah Dass died on 16 January 1965.