Kingdom of Kent
The date and place of Agilert's birth are unknown, but evidence suggests it took place between 610 and 620. Son of a Neustrian noble named Betto, he was a first cousin of Audoin and related to the Faronids and Agilolfings, and less certainly to the Merovingians. His name, the Frankish language equivalent of Æthelberht, has been taken to suggest a link with the royal family of the Kingdom of Kent.