Kaalingar was born in Kaalingarayar tribe around the end of 12th century CE and was a farmer, soldier, and a physician. His commentary to the Kural chapter on fortification (Chapter 75) and other war-related chapters are rife with information about battlefield, which hints his military background. It is also believed that he might have migrated from the Kalinga country and hence known by the name. He is believed to have lived around the 12th century CE. Kaalingar had great respect for Valluvar and referred to him as "Lord Valluvar" in his work. He is believed to have published his commentary around 1225 CE.
