Vallavilai is located north-west to Cape Comorin (Kanyakumari) and south-east to Trivandrum (capital of Kerala). This place has historical importance since the Portuguese invasion in India. St. Francis Xavier was visiting the coast from Punnalkayal to Kanyakumari in November – December 1544. After had a rich mission experience at the Fishery Coast, St. Francis Xavier entered into the Travancore Kingdom. When St. Xavier planned for a general conversion, he might have come to the Travancore Coast that extended from Kanyakumari to Quilon. Though there was a large population of infidels living outside the coast Francis Xavier tried first to convert the people of the coast. On December 1544, 10000 Mukkuva fishermen living in thirteen villages along the coast and Vallavilai is one among them. Vallavilai plays a vital role in Kollemcode panchayat's development.