|Region||Eastern Bird's Head|
Hattam (also spelled Hatam, Atam) is a divergent language of New Guinea. Apart from Mansim (Borai), formerly listed as a dialect, it is not closely related to any other language, and though Ross (2005) tentatively assigned it to the West Papuan languages, based on similarities in pronouns, Ethnologue and Glottolog list it as a language isolate or small independent family.
- Ross, Malcolm (2005). "Pronouns as a preliminary diagnostic for grouping Papuan languages". In Andrew Pawley; Robert Attenborough; Robin Hide; Jack Golson. Papuan pasts: cultural, linguistic and biological histories of Papuan-speaking peoples. Canberra: Pacific Linguistics. pp. 15–66. ISBN 0858835622. OCLC 67292782.