Nelcynda is a place in ancient Kerala. It was described in Pliny's classical work The Natural History as well as in Periplus of the Erythraean Sea. It was believed to be the capital of the Ay kingdom. Neendakara in Quilon district (now known as Kollam district) and Niranam in Pathanamthitta district are often identified with Nelcynda.
Nelcynda is mentioned by various authors under varying forms of the name. As has been already stated, it is Melkunda in Ptolemy, who places it in the country of the Ay. In the Peutingerian Table it is Nincylda, and in the Geographer of Eavenna, Nilcinna. Pliny the Elder in his book Naturalis Historia calls the port Neacyndi.
According to the Periplus, numerous Greek seamen managed an intense trade with Muziris:
Then come Naura (Kannur) and Tyndis, the first markets of Damirica or Limyrike, and then Muziris and Nelcynda, which are now of leading importance. Tyndis is of the Kingdom of Cerobothra; it is a village in plain sight by the sea. Muziris, of the same kingdom, abounds in ships sent there with cargoes from Arabia, and by the Greeks; it is located on a river (River Periyar), distant from Tyndis by river and sea five hundred stadia, and up the river from the shore twenty stadia. Nelcynda is distant from Muziris by river and sea about five hundred stadia, and is of another Kingdom, the Pandian. This place also is situated on a river, about one hundred and twenty stadia from the sea...."