I read in 'sri Ramanujar' published by Sri Ramakrishna Mutt that the earlier name of Ennayiram is Paruthikollai and SriRamanujar won the jains in debate and converted them to srivaishnavisam.This is reeported by Sri tho.mu. Bhaskara thondaiman in Kalaimagal January 1949.Sri Udaivar also built the Azhahiya Nrisimhaperumal temple there. sowmya
there is also a theory that the eighthousand jains were converted into Hinduism and because of their vegetarian habits were considered as brahmins and hence the sect called as "ashtasahasram(eightthousand)" started in brahmins(iyers)