article: Penda of Mercia
links: Wessex Northumbria Angles 7th century Gloucestershire Bernicia Bede Battle of Hatfield Chase Anglo-Saxon Chronicle Sussex Cirencester Warwickshire Welsh people Pybba of Mercia Shropshire Wulfhere of Mercia Deira Cwichelm of Wessex List of monarchs of Mercia Mercia Oswestry Cenwalh of Wessex Gwynedd Cynegils of Wessex Oswiu of Northumbria Peada of Mercia Britons (Celtic people) Leeds East Anglia Worcestershire River Humber Oswald of Northumbria