Faroese ostur

← Proto-Germanic *justaz (derived)

← Proto-Indo-European *yaus- (derived)

← Proto-Indo-European *yūs- (mention)

← Proto-Indo-European *yew(ǝ)- (derived)

← Old Norse ostr (derived)

→ Faroese djús (cognate)

→ Icelandic ostur (mention)