Despite vocabulary cognacy of 5% or so, Pawaia was included in Trans-New-Guinea because of pronoun resemblances to Kuman and on typological similarities. The typological similarities involve function only Trefry, David 1969 , and thus count for nothing. The pronoun resemblances do not generalize to the Chimbu family Foley, William A. 1986: 69-71 and match only an n anyway, so they are better accounted for as accidental similarities than deep relationship.
(see Hammarström 2017)