Mercia

Mercia ( /ˈmɜrsiə/, /ˈmɜrʃə/) was one of the kingdoms of the Anglo-Saxon Heptarchy. It was centred on the valley of the River Trent and its tributaries in the region now known as the English Midlands. The name is a Latinisation of the Old English Mierce or Myrce, meaning "border people".