The Walio languages are a small family of clearly related languages,

Walio, Pei, Yawiyo, and Tuwari.

However, they are not close: Walio and Yawiyo have only a 12% lexical similarity. ^[1] They are frequently classified among the Sepik languages of northern Papua New Guinea, though Glottolog leaves them out. Glottolog 3.4 classifies the Walio languages as an independent language family.

References

• Ross, Malcolm (2005). "Pronouns as a preliminary diagnostic for grouping Papuan languages". In Andrew Pawley; Robert Attenborough; Robin Hide; Jack Golson (eds.). Papuan pasts: cultural, linguistic and biological histories of Papuan-speaking peoples. Canberra: Pacific Linguistics. pp. 15–66. doi:10.15144/PL-572. ISBN   0858835622. OCLC   67292782.