Around 699 Dagobert III King of the Franks was born to Childebert III King of the Franks [aged 20].
In 715 Dagobert III King of the Franks [aged 16] died.
Anglo-Saxon Chronicle. 715. This year Ina [aged 45] and Ceolred fought at Wanborough;24 [possibly Wednesbury, Staffordshire [Map], Wanborough, Wiltshire [Map] or Woden's Barrow aka Adam's Grave [Map]] and King Dagobert [aged 16] departed this life.
Note 24. Wothnesbeorhge, Ethelw.; Wonsdike, Malmsb.; Wonebirih, H. Hunt; Wodnesbeorh, Flor.; Wodnesbirch, M. West. There is no reason, therefore, to transfer the scene of action to Woodbridge, as some have supposed from an erroneous reading.
On 23rd April 771 [his father] Childebert III King of the Franks [aged 92] died. His son Dagobert succeeded King of the Franks.