The Kamayo are concentrated in Bislig City, Lianga, Marihatag, and San Agustin in Surigao del Sur, Mindanao. A scattered population is also found in Cateel and Baganga, Davao Oriental.
Kamayo is related linguistically to the Tausug and Butuanon, and belongs to the Meso and central Philippine family of languages. However, the people speak dialects that vary from town to town. Meanwhile, some municipalities such as Lingig, Bislig, Barobo, and Hinatuan are using a different version of the language: A prefix is attached to most adjectives. The disparities of the dialects are due to the interchange of communication between the Kamayo settlers and the native Manobo.
More about the Kamayo People here: Meet the Kamayo People of Surigao del Sur
National Commission For The Culture And The Arts, http://www.ncca.gov.ph/