The nomenclature of Khammam is said to have derived from a temple ‘Narasimhadri’ built on a hillock in the town. The temple was referred as ‘Stamba Sikhari’ and later ‘Stambadhri’. It is believed that lord Narasimha emerged from a stone pillar and killed the evil king Hiranya kasyapu to save his child devotee Prahlada. This incident is said to have occurred in the Krutayuga. The vertical rock under the temple is known as ‘Kamba’ and the town at the foot of the hill was called Kambamettu which gradually changed to Khammam matt and finally Khammam.