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MERCIA (one of the 7 great anglo-saxon kingdoms, saxon name for Powys) the Kings and later Sheriffs of Mercia bear the bear in their arms probably descending from Owain Ddantgwyn (Arthur ? = the bear)
Aelle 477- King of Sussex, called Bretwalda (ruler over Britain) by the Saxons
Penda 633-655 was allied to Cadwallon of Gwynedd and defeated Eadwini of Northumbria in 633. In 634 Cadwallon was defeated by Oswald of Northumbria and in 655 Penda was defeated by Oswiu of Northumbria then allied to Cynddylan of Powys and Æthelhere of East-Anglia. His wife was Cynwise, their daughter was named Cyneberga, probably due to good relationship to Cynddylan of Powys.
Peada 655-658 son of Penda, invested by Oswiu of Northumbria as a marionet-king after his fathers defeat.
Wulfhere 658-675
Offa 757-796 said to be the inventor of the Peter's-penny, paid for each fireplace in the kingdom to the Vatican. Actually Alkuin, an irish monk at the court of Carolus Magnus invented the Peter's-penny which was accepted in Britain. Offa of Mercia was also King of East-Anglia.