The Duchy or Ducatus is the denomination for territories occasionally governed separately by members (dukes) of the Árpád dynasty within the Kingdom of Hungary in the 11th-12th centuries. The symbol of the ducal power was a sword, while the royal power was represented by the crown. Modern historians do not share a consensual view on the origins of the Duchy or territorial units administered by members of the royal family within the medieval Kingdom of Hungary. György Györffy writes that the Ducatus or "Duchy" developed from the command over the Kabars and other ethnic groups which joined the federation of the Hungarian tribes.