octarchy

/ˈɑktɑrki/
noun
  1. A government or ruling body made up of eight people or groups.
    • The ancient city was governed by an octarchy of eight elders.
    • The council formed an octarchy to share power among eight representatives.
    • Some historians describe the early Anglo-Saxon kingdoms as an octarchy.
  2. A group of eight states or territories that are united under a single authority.
    • The octarchy met annually to discuss common laws and defense.
    • The alliance of eight provinces was known as the octarchy.
    • In medieval times, the octarchy controlled trade across the region.