Ko Kizhan Adikal Ravi Neeli, or Udaiyapirattiyar Kizhan Adikal, was the traditional title of the queens/princesses of the Chera Perumal kingdom in medieval south India. It was initially assumed that Kizhan Adikal was a proper given name (and not a royal title). The title appears in the following inscriptions discovered from Kerala and Tamil Nadu. There is a possibility that the princesses (2) and (3) are the same, or are sisters. If they were sisters, king Parantaka I married two distinct Chera princesses (the mothers of his two sons, Rajaditya and Arinjaya Chola).