The stepson theory is strengthened by the fact that the name Sigeberht is without comparison in the East Anglian Wuffingas dynasty .
The stepson theory is closely resembles the naming fashions of the East Saxon royal house .
The stepson theory is strengthened by the fact that the name Sigeberht is without comparison in the East Anglian Wuffingas dynasty , but closely resembles the naming fashions of the East Saxon royal house .