Payaswini also called Paachini in Tulu and Malayalam. This river is considered as the traditional boundary between Kolathunadu and Thulunadu. In Kasaragod the river is called Chandragiri river.
Payaswini river (Chandragiri River) seen from the Chandragiri fort. What you see as the peninsular part is the present day Kasargod district , part of the the erstwhile Tulunadu kingdom.