The region is well known since Puranic ages. The estate of Ramnad included the Hindu holy island city of Rameswaram, from where, legend has it that the Hindu god Rama launched his invasion of Ravana's Lanka. On the conclusion of the war and Rama's success in it, he appointed a "Sethupathi" or "lord of the bridge" to guard the way to the island. The "bridge" referred to here is the legendary Adam's Bridge or Rama's Bridge which was believed to have been constructed by Rama. The chieftains of Ramnad were entrusted with the responsibility of protecting the bridge, hence the appellation.