Medlands has Dagobert's mother as the SECOND wife of Clothaire -Beretrudis
"DAGOBERT, son of CLOTAIRE II King of the Franks & his second wife Beretrudis [Bertrada or Berthe] ([610/11-Saint-Denis 19 Jan 639, bur église abbatiale de Saint-Denis). The Gesta Dagoberti names "Dagobertus" as son of "Chlotharius filius Chilperici…ex Bertedrude regina"[382]. His father appointed him as DAGOBERT I King of the Franks in Austrasia in 623, under pressure from the Austrasian aristocracy to have their own king."
://fmg.ac/Projects/MedLands/MEROVINGIANS.htm#DagobertIdied638B
