Aragalurudaiya Ponparappinan Rajarajadevan, alias Magadesan, was the Bana chief who ruled this region around 1197.
There were three important chieftains in this region: Another chief family near Aragalur were the Vanakkovaraiyars with headquarters at Thedavur.
The Magadai Mandalam was at the height of their power during the transition of Chola dynasty to Pandyan and Hoysala.
There are a large number of inscriptions about the Magadai chiefs in North (Tiruvannamalai & Vellore) and South Arcots (Cuddalore and Villupuram), Chingleput and Thanjavur districts.
There is a possibility that descendants of the Magadhan Empire could have settled in this area on their way south to Sri Lanka.