Ross also included the unclassified language Tause, but as a stimulus for investigation rather than as a serious proposal.
They are distinguished from the West Papuan family in having forms like ba or wa for the second-person singular ("thou") pronoun.
East Bird's Head–Sentani unifies two groups that Wurm placed at the family level, and one or two isolates.
Clouse (1997) classified it as a Lakes Plain language, but its pronouns are not a good match.
Saponi shares half of its basic lexical vocabulary with Rasawa, but its pronouns instead resemble those of East Bird's Head.