Ngiyampaa was the traditional language of the Wangaaypuwan and Wayilwan peoples of New South Wales, Australia, but is now moribund.

[2] Donaldson records that by the 1970s there were only about ten people fluent in Wangaaypuwan, and only a couple of Wayilwan speakers left.

Other names for Ngiyambaa are: Giamba, Narran, Noongaburrah, Ngampah, Ngemba, Ngeumba, Ngiamba, Ngjamba, Ngiyampaa and Ngumbarr; Wangaibon is also called Wangaaybuwan and Wongaibon, and Weilwan is also called Wailwan, Wayilwan, or Wailwun.

[5] [6][7] The Wangaaypuwan (with wangaay) people are so called because they use wangaay to say "no", as opposed to the Ngiyampaa in the Macquarie Marshes and towards Walgett, who were historically defined separately by colonial ethnographers as Wayilwan, so-called because their word for "no" was wayil.

[8][6] The distinction between Ngiyampaa, Wangaaypuwan, and Wayilwan traditionally drawn, and sanctioned by the classification of Norman Tindale, may rest upon a flawed assumption of marked "tribal" differences based on Ngiyampaa linguistic discriminations between internal groups or clans whose word for "no" varied.