There is no contemporary evidence for Eormenred, but he is mentioned in later hagiographies, and his existence is considered possible by scholars.
[1] In the Kentish royal legend, Eormenred is described as a son of Eadbald, who was King of Kent from 616 to 640,[1] and his second wife Emma, who may have been a Frankish princess.
[1] Before his father's death, Eormenred married Oslava and had at least four children, possibly five: two sons, Æthelred and Æthelberht, and two daughters, Domne Eafe and Eormengyth.
However, after Eorcenberht himself died, his son and successor Ecgberht arranged for the murder of these potential rival claimants to the throne, who were later venerated as saints.
[3] Domne Eafe was not killed, and was subsequently granted land on Thanet by Ecgberht for a monastery, as penance for the murder of her brothers.