The family reached Ameda about 600 years ago. The myth about the voyage of the Mangalam family for reaching Ameda and settling there is also an interesting one. The story starts with a Namboodiri family lived at a place named 'Vettam' in a village called 'Sukapura' which was situated at the North West parts of Kerala. In the course of time, the brothers of the family quarreled with each other resulting the elder brother and his family leaving the house. Through Tripangode, Thirunavaya, Guruvayoor, Vadakkunnathan, Triprayaar, Kodungaloor, Tripunithura, they reached Chottanikkara. After coming to know about the financial problems of the Brahmana, the 'Pallipurathu Namboodiri family' who managed Chottanikkara temple, gave a house for them to live.

On the night of the attempted theft, something else dramatic happened elsewhere. The Goddess came to the dreams of the 'Namboodiris' who managed the affairs of the temple till then, and was instructed upon to leave the management to the Mangalam Namboodiris. The Namboodiris acted accordingly and left the management of the temple to the Mangalam Namboodiris and since then the family came to be known as Ameda Mangalam. According to a 'Devaprashna' conducted about 20 years ago in the 'Thekkumpattu Illom' in the village of 'Sukapuram', it was found that the present 'Punnamana Narasimha Swamy Temple' was the old 'Vettathu Vishnu Temple' and the management and the ownership of the temple goes to Ameda Mangalam family. Since the 'Devaprashna' the temple has been owned and managed by the Ameda Mangalam family and 'Thekkumpattu Illom' jointly.