Kocengannan
Kalavali by Poygayar mentions the Chola king Kocengannan and his battle with the Chera king Kanaikkal Irumporai. The Chera was taken prisoner and Poygayar, who was a friend of the Chera, sang Kocenganna’s prince in 40 stanzas. The Chola king, pleased with the work, released the Chera. Kalavali describes the battle fought at Kalumalam, near the Chera capital.
Kocengannan became the subject of many legends in later times and is portrayed as a pious Siva devotee who built many fine temples for Siva along the banks of the river Kaveri.
Read more about this topic: Colandia, Cholas in Sangam Literature