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.
Surigaonon language
Surigaonon is a Visayan language. It has been heavily influenced by Cebuano due to the influx of many Cebuanos in the region. However, most Cebuano speakers can hardly understand Surigaonon speakers, except for Cebuanos who has been living in the region for years.