In continental Europe different systems of hereditary knighthood have existed or do exist. "Ridder", Dutch for "knight", is a hereditary noble title in the Netherlands. It is the lowest title within the nobility system and ranks below that of "Baron" but above "Jonkheer" (the latter is not a title, but a Dutch honorific to show that someone belongs to the untitled nobility). The collective term for its holders in a certain locality is the Ridderschap (e.g. Ridderschap van Holland, Ridderschap van Friesland, etc.). In the Netherlands no female equivalent exists. Before 1814, the history of nobility is separate for each of the eleven provinces that make up the Kingdom of the Netherlands. In each of these, there were in the early Middle Ages a number of feudal lords who often were just as powerful, and sometimes more so than the rulers themselves. In old times, no other title existed but that of knight. In the Netherlands only 10 knightly families are still extant, a number which steadily decreases because in that country ennoblement or incorporation into the nobility is not possible anymore.