Wikipedia
Demalagattara
Demalagattara are a social group or caste amongst the Sinhalese of Sri Lanka. Demalagattara are Theravada Buddhists by religion. They are ethnically Sinhalese but proclaim their Tamil ethnic origins, whereas all other South India-derived castes such as Karave, Salagama, Durave and Berava do not emphasise their Tamil links as part of their assimilation into Sinhalese society.