 Terrence Kaufman (1994) included it in his hypothetical Macro-Paezan family, but the necessary supporting work was never done.Julian Granberry connected many of the grammatical forms, including nominal and verbal suffixes, of Warao to the Timucua language of North Florida, also a language isolate.However, he has also derived Timucua morphemes from Muskogean, Chibchan, Paezan, Arawakan, and other Amazonian languages, suggesting multi-language creolization as a possible explanation for these similarities.