What is the Merovingian Line, and why is it controversial?
The Merovingian line was founded by Merowig (numerous pronunciations) and the most famous was Clovis (Louis) who converted to Christianity (along with a mass conversion of the Franks). Like most barbarians, the Franks and their kings tried to claim the mantle of the Romans, culminating in the coronation of Charlemagne. Surely any attempt to claim descent from a Christain line would have antedated Clovis at the very least.