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Nayak is a title used by various castes and ethnic groups across India. Alternative spellings and variations include Nayaka, Nayakar, Nayagar, Nayakkar, Naik, Naiker, Naicker, Naickan, Naiken, Nayakkan, Nayan, Nayar, "Nayi or Nayee", Nayanar, Nair, Naidu, "Nai", Nayudu and Naidoo.
- P. V. Balakrishnan (1981). Matrilineal System in Malabar. p. 27.