This polity was termed the "ducatus Cenomannicus", or Duchy of Maine, and this was an alternative name for the "regnum" of Neustria well into the 9th century.
Karolinški kralji so ustanovili tudi Nevstrijsko marko, ki je bila obmejna vojvodina proti Bretoncem in Vikingom, in je trajala do Kapetske dinastije v poznem 10. stoletju, ko je izraz zamrl kot evropski politični ali geografski pojem.