Etymology tree Proto-Indo-European *wl̥kʷós? Proto-Indo-European *wĺ̥kʷosder. Proto-Italic *lukʷos Osco-Umbrianbor.? Latin lupus Old Galician-Portuguese lobo Portuguese lobo Proto-Tupi-Guarani *awara Old Tupi agûará Portuguese lobo-guará From lobo + Old Tupi agûará.