The Tidung, Tidong are a native group originating from northeastern part of Borneo and surrounding small islands. They live on both sides of the border of Malaysia and Indonesia.

The Dayak or Dyak or Dayuh are one of the native groups of Borneo. It is a loose term for over 200 riverine and hill-dwelling ethnic groups, located principally in the central and southern interior of Borneo, each with its own dialect, customs, laws, territory, and culture, although common distinguishing traits are readily identifiable. The Dayak were animist in belief; however, since the 19th century there has been mass conversion to Christianity as well as Islam due to the spreading of Abrahamic religions.