It is not known when Sigeberht was born .
Nothing is known of Sigeberht 's life Sigeberht he was exiled from East Anglia prior to becoming king , as few records have survived from this period of English history .
It is not known when Sigeberht was born and nothing is known of his life before he was exiled from East Anglia prior to becoming king , as few records have survived from this period of English history .