The genetic relationship is primarily based upon morphology and not lexical comparison,[3] with the strongest evidence being found among the pronouns.

However, "there are very few other systematic similarities in other areas of grammar[, which] throw some doubts on the Mirndi classification, making it less secure than generally accepted.

[5] Nungali Jaminjung Jingulu Ngarnka Wambaya An additional language may be added, Ngaliwurru.

[2][6][7][8][9] The same is true for Gudanji and Binbinka, although these are generally considered dialects of the Wambaya language.

Chadwick, Neil (1997) "The Barkly and Jaminjungan Languages: A Non-Contiguous Genetic Grouping In North Australia" in Tryon, Darrell, Walsh, Michael, eds.