Kamayo (Kinamayo or alternatively spelled Camayo), also called Kadi, Kinadi, or Mandaya, is a minor Austronesian language of the central eastern coast of Mindanao in the Philippines.
Spoken in some areas of Surigao del Sur (the city of Bislig and the municipalities of Barobo, Hinatuan, Lingig, Tagbina, Lianga, San Agustin & Marihatag) and Davao Oriental, Kamayo varies from one municipality to another.
Ethnologue also reports that Kamayo is spoken in the Agusan del Sur Province border areas, and in Davao Oriental Province between Lingig and Boston.
Kamayo is a language widely used by the Mandayas in the Davao Oriental areas.
The towns of Barobo, Hinatuan, and Lingig has a distinct version spoken.