Karkottakan was a powerful Naga king (serpent king),as per Hindu mythology he is one of the 8 Naga kings. Once upon a time a has to heed to the request of Lord Indra the king of heaven (swargaloga) to bite the famous king Nala. To wipe of the sin committed the Naga king performed pooja in this place. Lord Vishnu considered his remorse action and graced him with act of forgiveness and removed his sufferings. Even today plenty of black cobras are found around this place . The place would be cooler in summer(Kodai in Tamil) compared to other places around. That provides the name Kottaganallur.
Dhakshina Ahobila (south Ahobila) is considered to be 1200-1500 years old.
The Devas and the rishis (sages) came to this place, Keezhapavur and performed a rigorous penance for several years.
People appeal to Lord Narasimha for relief from DEBT burdens and for Marriage to happen standing delayed due to some reason or other.
Around 300 years ago, the sound of Lions roar used to come from the temple.
Ugra Narasimha with 16 hands is seen only in very few temples