The Macro-Gunwinyguan languages, also called Arnhem or Gunwinyguan, are a family of Australian Aboriginal languages spoken across eastern Arnhem Land in northern Australia. Their relationship has been demonstrated through shared morphology in their verbal inflections.
Many of the languages have a fortis–lenis contrast in plosive consonants. Lenis/short plosives have weak contact and intermittent voicing, while fortis/long plosives have full closure, a more powerful release burst, and no voicing.
This is close to what Evans (1997) proposed under the name Gunwinyguan (cf. his very different proposal of Arnhem Land languages.)
Heath (1990) demonstrated an East Arnhem family of Ngandi + Nunggubuyu; Enindhilyagwa was added later.