The Nuristanis, formerly known as Kafiristanis, are an ethnic group native to the Nuristan Province of northeastern Afghanistan and Chitral District of northwestern Pakistan. Their languages comprise the Nuristani branch of Indo-Iranian languages.
In the mid-1890s, after the establishment of the Durand Line when Afghanistan reached an agreement on various frontier areas to the British Empire for period of time, Emir Abdur Rahman Khan conducted a military campaign in Kafiristan and followed up his conquest with forced conversion of the Kafirs to Islam; the region thenceforth being known as Nuristan, the "Land of Light". Before their conversion, the Nuristanis practiced a form of ancient Hinduism. Non-Muslim religious practices endure in Nuristan today to some degree as folk customs. In their native rural areas, they are often farmers, herders, and dairymen.
The Nuristan region has been a prominent location for war scenes that have led to the death of many indigenous Nuristanis. Nuristan has also received abundance of settlers from the surrounding Afghan regions due to the borderline vacant location.
Noted linguist Richard Strand, an authority on Hindu Kush languages, observed the following about pre-Islamic Nuristani religion:
"Before their conversion to Islâm the Nuristânis practiced a form of ancient Hinduism, infused with accretions developed locally".
They acknowledged a number of human-like deities who lived in the unseen Deity World (Kâmviri d'e lu; cf. Sanskrit deva lok'a-).
Certain deities were revered only in one community or tribe, but one was universally revered as the creator: the Hindu god Yama Râja called imr'o in Kâmviri. There is a creator god, appearing under various names, as lord of the nether world and of heaven: Yama Rājan, or Māra ('death', Nuristani), or Dezau (ḍezáw) whose name is derived from Indo-European *dheig'h i.e. "to form" (Kati Nuristani dez "to create", CDIAL 14621); Dezauhe is also called by the Persian term Khodaii. There are a number of other deities, semi-gods and spirits.