Sigebert eventually had an heir, Dagobert II, but Grimoald feared the fate of his own dynasty and exiled the young Dagobert to either an Irish monastery or the cathedral school of Poitiers.
Sigibert fik til sidst en arving, Dagobert II, men Grimoald frygtede sit eget dynastis skæbne og sendte den unge Dagobert i eksil, enten til et irsk kloster eller katedralskolen i Poitiers.