Etymology tree Proto-West Germanic *sunþ Proto-Indo-European *sóh₂wl̥ Proto-Indo-European *sh₂w-én-s Proto-Indo-European *-teros Proto-Indo-European *sh₂ún-teros Proto-Germanic *sunþraz ▲ Proto-Germanic *sunþraz Proto-Germanic *sunþrą Proto-West Germanic *sunþr Old English sūþ Middle English south English south English -bound English southbound From south + -bound.