Siouan languages
Authors who call the entire family "Siouan" distinguish the two branches as "Western Siouan" and "Eastern Siouan" or as "Siouan-proper" and "Catawban". Others restrict the name "Siouan" to the western branch and use the name "Siouan–Catawban" for the entire family. Generally, however, the name "Siouan" is used without distinction.
Assiniboine language
The Assiniboine language (also known as Assiniboin, Hohe, or Nakota, Nakoda, Nakon or Nakona, or Stoney) is a Nakotan Siouan language of the Northern Plains. The name Assiniboine comes from the term "Asiniibwaan", from Ojibwe, meaning "Stone Siouans". The reason they were called this was that Assiniboine people used heated stone to boil their food. In Canada, Assiniboine people are known as Stoney Indians, while they called themselves Nakota or Nakoda, meaning "allies""."