Siouan languages
Siouan or Siouan–Catawban is a language family of North America that is located primarily in the Great Plains, Ohio and Mississippi valleys and southeastern North America with a few other languages in the east.
Siraya people
The Siraya are Taiwanese Plains Aborigines ("Pingpu") — that is, occupants of flat coastal regions rather than mountain areas. Like other indigenous peoples of Taiwan they are ethnically and linguistically Austronesian. The name "Taiwan" (historically "Taiouwang", and other variants) originated from the Siraya language. The Austronesian language family to which Sirayan belongs includes most of the languages spoken in the western Pacific, including Polynesian, Indonesian, Filipino and Malaysian.