Nayak, Nayaka, Nayakar, Nayagar, Nayakkar, Naik, Naiker, Naicker, Naickan, Naiken, Nayakkan, Nayan, Nayar, Nayanar, Nair, Naidu, Nayudu or Naidoo is a common title used by various scheduled caste and ethnic groups across India.
Caste such as the Vanniyar,. Kapu Rajakambalam (Pedda Kapu) are mostly using this title in Andhra Pradesh and Tamil Nadu. In Kerala, the term Nair, Nayar, Nayanar etc. is said to be the adoption of the Sanskrit word Nayaka in Malayalam.