Vanchippattu

"Vanchippattu" is a poetic form in Malayalam composed entirely in the Dravidian metre "Nathonnata". It is originated from Kerala, a state in India.
History.
This poetic form was created by Ramapurathu Warrier, a poet in Malayalam lived in Travancore (later became a part of Kerala) during the reign of the king Anizham Thirunal Marthanda Varma. It is believed that, it was created during a boat travel of Ramapurathu Warrier along with the King Marthanda Varma. Warrier recited his poem to the king. This poem was later became the famous poetic collection "Kuchelavritham Vanchippattu." 
Etymology.
The word Vanchippattu is a combination of two words "vanchi" means Boat and "pattu" means song. This poetic form has a rhythm similar to that of rowing the boat. Hence it got this name, according to historians.