Fridiburga was betrothed (613) to Sigebert II of Austrasia
He was killed before the marriage could take place
No husband or children are attested for her

Fridiburga has been suggested as the possible second wife of the Anglo-Saxon king Aethelbert I of Kent
If so with his early death (616) she then became the second wife of her stepson Eadbald of Kent
The marriage produced one daughter who became a nun
This marriage was ended by the church on the grounds of incest