The countries Spain and Luxembourg are currently ruled by kings from the House of Bourbon, so I thought I'd try to trace back their (patrilineal) ancestry as far as possible. Well, the Bourbons are descended from the Capetian dynasty, which in turn is descended from a noble family known as the Robertians. The Robertians came to rule France in the ninth century, but before that they were counts of Worms, going back to their namesake Robert of Hesbaye. His ancestors were dukes of Neustria and counts of Haspengau (an older name for Hasbaye), going back to Charibert of Haspengau.
But here I'm hitting somewhat of a dead end. The site that Wikipedia relies upon for all this information doesn't list any ancestors of Charibert. But this site claims that his father was Tassilon I, one of the first rulers of Bavaria. Can anyone verify this claim? (Note that this would be impossible if we go by what Wikipedia says about when Charibert lived, but Wikipedia's own source contradicts that information.)
I'm somewhat skeptical, because Bavaria (in modern-day Germany) is about 400 miles from Hespengau (in modern-day Belgium). But I suppose it's possible that one of Tassilon's sons went on a long journey west for some reason and established a new estate there. (This would be a case of a Frankish nobleman going to another Frankish territory.). In any case, if it is true then that would mean that the Robertians are ultimately descended from the Agilolfings, a noble family that traces its origins all the way back to Hermeric, a Germanic ruler who was an enemy of the Romans.
Any help would be greatly appreciated.
Thank You in Advance.