There is a fascinating myth about the name of Adat and Adat Maha Vishnu Temple. This is associated with Kurur Mana House and mother (Kururamma). There was a boy who came to help Kururamma with her daily Guruvayoorappan puja. Waiting for the priest Vilwamangalam Swamiyaronce Kururamma saw that the boy who had come to help had eaten the offering naivedhya and she closed the boy in a pot.
Later they came to the conclusion that this boy is really Guruvayurappan and from then onwards the place became known as Adat in the sense that the pot was "closed".