overlordship

The state, office, or dignity of an overlord; specifically, in reference to early English history, the preëminence or authority of one of the Anglo-Saxon kings or kingdoms over certain other kings, kingdoms, chiefs, etc. Such an overlordship was held at different times by kings of Kent, Northumberland, Mercia, and Wessex.

Lordship or supremacy of a person or a people over others.

The position or quality of being an overlord.

the position of overlord