"Tidong" (Bolongan, Camucones, Nonukan, Tarakan, Tedong, Tidoeng, Tidung, Tiran, Tirones, Tiroon, Zedong) is the name used for an Islamized population found in north-eastern Kalimantan and Sabah. In Malaysia, the population is estimated at about 10,000. People labeled Tidong were probably early inhabitants of the region or people who migrated there from the interior. Contact with the Tausug and Bugis led to large-scale cultural change and conversion to Islam. Even so, Tidong have remained distinct from other groups in the region.
Sather, Clifford (1972). "Tidong." In Ethnic Groups of Insular Southeast Asia, edited by Frank M. LeBar. Vol. 1, Indonesia, Andaman Islands, and Madagascar, 167-168. New Haven: HRAF Press.