Ngaju (meaning 'upstream') is the name given to a group of linguistically and culturally similar peoples inhabiting the upper reaches of several south-flowing rivers in the south of Borneo. In the past they, along with several other peoples of Borneo, were often known as 'Dayaks'. The indigenous Ngaju religion involved a sky god, Hatalla, and an earth goddess, Jata. According to the missionary and anthropologist Hans Scharer, these two gods were manifestations of one supreme 'godhead'. Although most Ngaju have converted to Christianity, the traditional religion survives to an extent in the form of the syncretic religion Kaharingan.