can you tell me the history of the aforesaid kingdom?
Kingdom of East Anglia, was a small independent kingdom of the Angles comprising what are now the English counties of Norfolk and Suffolk and perhaps the eastern part of the Fens.
Kingdom of East Anglia
Kingdom of East Anglia, was a small independent kingdom of the Angles comprising what are now the English counties of Norfolk and Suffolk and perhaps the eastern part of the Fens. 
what is alberht of east anglia? An eighth-century ruler of the kingdom of East Anglia. when was his reigning period? Ruled 749 – about 760 did he share his kingdom with anyone? With Beonna who is he? A Mercian and who took the lead in issuing regnal coinage and maintaining a military alliance with Æthelbald, king of Mercia.
wiki:22999581
Kingdom of East Anglia [SEP] Introduction
The Kingdom of the East Angles (; ), today known as the Kingdom of East Anglia, was a small independent kingdom of the Angles comprising what are now the English counties of Norfolk and Suffolk and perhaps the eastern part of the Fens. The kingdom formed in the 6th century in the wake of the Anglo-Saxon settlement of Britain. It was ruled by the Wuffingas dynasty in the 7th and 8th centuries, but fell to Mercia in 794, and was conquered by the Danes in 869, to form part of the Danelaw. It was conquered by Edward the Elder and incorporated into the Kingdom of England in 918.