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.
Siraya language
Siraya is a Formosan language spoken until the end of the 19th century by the indigenous Siraya people of Taiwan, derived from Proto-Siraya. Some scholars believe Taivoan and Makatao are two dialects of Siraya, but now more evidence shows that they should be classified as separate languages.