Penda of Mercia
Merewalh (sometimes given as Merwal or Merewald was a sub-king of the Magonsæte, a western cadet kingdom of Mercia thought to have been located in Herefordshire and Shropshire. Merewalh is thought to have lived in the mid to late 7th century, having acceded the throne during the time of Penda of Mercia, who, the "Anglo-Saxon Chronicle" implies, was his father :