The Krio people or Dayak Krio are a Dayak ethnic group in West Kalimantan, Indonesia. They live on the upper course of the Krio River and speak the Krio Dayak language.
The Ulu Aik Kingdom was established, by the upper course of the Krio River, around 1700 by Pancur Sembore and Tanjung Porikng. The first leader was pang ukir Empu Geremeng, who was succeedded by Bikukng Tiung. Under Bihukng's leadership, the kingdom was renamed Ulu Aik.
Duwata is the god of the Krio Dayak and the Jelai Dayak.
The Dayak or Dyak or Dayuh /ˈdaɪ.ək/ are the native people of Borneo. It is a loose term for over 200 riverine and hill-dwelling ethnic subgroups, located principally in the interior of Borneo, each with its own dialect, customs, laws, territory and culture, although common distinguishing traits are readily identifiable. Dayak languages are categorised as part of the Austronesian languages in Asia. The Dayak were animist in belief; however many converted to Islam and since the 19th century, mass conversion to Christianity.
The Dayak people of Borneo possess an indigenous account of their history, mostly in oral literature, partly in writing in papan turai (wooden records), and partly in common cultural customary practices. Among prominent accounts of the origin of the Dayak people includes the mythical oral epic of "Tetek Tahtum" by the Ngaju Dayak of Central Kalimantan, it narrates the ancestors of the all Dayak people descended from the heavens before dispensing from the inland to the downstream shores of Borneo.