What is "hyang"

A hyang ( Kawi, Javanese, Sundanese, and Balinese) is an unseen spiritual entity that has supernatural power in ancient Indonesian mythology. This spirit can be either divine or ancestral. The reverence for this spiritual entity can be found in Sunda Wiwitan, Kejawen, and Balinese Hinduism. In the modern Indonesian this term tends to be associated with gods, devata, or God. The realm where the hyangs reside is called kahyangan; now a synonym for svarga or heaven in modern Indonesian.