It's probably a Maori/Polynesian origin name, like Ngaire, which is pronounced ny-REE (Nyree is another spelling of this name). Ngaire and Nyree have both spread to Australia from New Zealand, so I imagine there's more similar names in general use in NZ.
♦ Chrisell ♦
All we have to decide is what to do with the time that is given us. - J.R.R. Tolkien.