Cearl was the third king of Mercia, from about 606 to about 626. He had a daughter who married the exiled Edwin of Deira, who was later king of Northumbria.
Mercia, sometimes spelled Mierce, was one of the kingdoms of the Anglo-Saxon heptarchy, in what is now England, in the region of the Midlands, with its heart in the valley of the River Trent and its tributary streams.
The name Mercia is Old English for "boundary folk" (see marches), and the traditional interpretation was that the kingdom originated along the frontier between the Welsh and the Anglo-Saxon invaders, although P.
Cearl, a kinsman of Creoda, followed Pybba in 606; in 615, Cearl gave his daughter Cwenburga in marriage to Edwin, king of Deira whom he had sheltered while he was an exiled prince.
Mercia was one of the kingdoms of the Anglo-Saxon Heptarchy, in what is now England, in the region of the Midlands.
While the earliest known king of Mercia was named Cearl, and is only known because he gave his daughter in marriage to Edwin, king of Deira, the first Mercian king we know more about than his name is Penda, who ruled c.632 - 654.
Mercia soon returned to the rule of her own king, but its days as the leading power of England had passed.