The story begins around the year 1850. Some believe the Maniyil family - Kiriyathil Nairs - rooted in Vilayanoor was distinct from the family of same name from Erimayur. The early member of Vilayanoor Maniyil family known is my great great grand mother Kuppu Amma Sr. who believed to have lived between 1850 and 1890. No record or any of that kind to prove the period. But some temple utensils and supports made of stone henge had engravings of some years (Kollam) and names were well studied by Maniyil Raghavan Nair (deceased) and a few seen by me when I was a child. If some one know the members names of Erimayur Maniyil family in the second half of 19th century could help to study the matter of whether Kuppu Amma was detached from the original Erimayur Maniyil family to settle in Vilayanoor due to partition, elopement, epidemic or draught.
The truth was that around that period, 1850, both families were one, and on a fine day, after a funeral, some of the collected family members who came to condole on the death, were not regarded and allowed to enter the house (Ettukettu), instead they were greeted with an upside down empty 'kindi' (the term originated from Arabic) a brass utensil used to carry a small amount of water to wash feet, face and arms. With that misdemeanor on the face of relatives, the relationship (social) was broken and they were separated.
The Kula Devata (deity) of Maniyil family is Lord Ayyappan of Kodakkat, Payyannur, Kannur District. This hints that they might have come from a place near Kannur, former North Malabar area some time around 16th century AD.
In Thenkurissi, close to Vilayannur and Erimayur also another Maniyil family is there. They too are detached from the others of Vilayannur and Erimayur Maniyil families.
Another Nair family with the same name is found in Manjeri, Kozhikkod. Late Tamil film actor M.N. Nambyar was related to it.
There is a place named Maniyil (I am not sure the pronunciation is correct) in Wayanad, Kozhikkod.