Complex sentence: These in turn were preceded by the "dibellion" (διβέλλιον), the emperor's personal ensign, whose name--most likely a mixed Greek-Latin compound meaning "double" velum ""--describes a forked pennon, evidently of Western European origin.
Split into simpler sentences: These in turn were preceded by the "dibellion" (διβέλλιον), the emperor's personal ensign. Is name, most likely a mixed Greek-Latin compound meaning "double" velum "", indicates a forked pennon, evidently of Western European origin.