Cearl of Mercia

Who was Cearl of Mercia?

Cearl was an early king of Mercia who ruled during the early part of the 7th century, until about 626. He is the first Mercian king mentioned by Bede in his Historia ecclesiastica gentis Anglorum.

Cearl's ancestry is unknown. He is not included in the Mercian royal genealogy; Henry of Huntingdon in the 12th century placed him as ruling after Pybba, saying that he was not Pybba's son but was his kinsman.

Bede mentions him only in passing, as the father-in-law of Edwin of Deira. According to Bede, Edwin married Cwenburh, daughter of "Cearl, king of the Mercians" while he was in exile, and with her had two sons, Osfrith and Eadfrith. Historians have noted the marriage as evidence for Cearl's independence from the then-Northumbrian king Æthelfrith, since Edwin was Æthelfrith's rival and Cearl would not have married his daughter to an enemy of his overlord. The Historia Britonum credits the later king Penda with first separating the Mercians from the Northumbrians, but if Cearl was able to make this marriage to Æthelfrith's enemy he must not have been subject to him—possibly any subject relationship only developed at a later date. The historian D. P. Kirby speculated that perhaps Cearl was enabled to marry his daughter to Edwin due to the protection of the powerful East Anglian king Raedwald, and that Edwin's subsequent exile among the East Angles may have been due to Æthelfrith's power beginning "to impinge on Cearl or his successors among the Mercians".