The Ottilien languages are all spoken in Yawar Rural LLG, in locations mostly along the coast of Madang Province, Papua New Guinea.
[1][2] Watam and Bosman share plural morphology with Lower Sepik (Nor–Pondo), supporting the Ramu – Lower Sepik language-family proposal.
The family is named for the mouth of the Ottilien River, now known as the Ramu.
Usher (2020) reconstructs the consonant inventory as follows:[3] Pronouns in proto-Watam-Awar-Gamay (proto-Ottilien) reconstructed by Foley (2005) are:[4] See also Lower Ramu languages#Pronouns.
[4] Below, proto-Watam-Awar-Gamay is listed in comparison with four other Ramu languages that are closely related to, but not part of, Watam-Awar-Gamay: the Misegian languages Kire and Mikarew, and the Tanggu languages Tangu and Igom.