After the Capet family had been destroyed by Edward III’s mothers revelations of her sister in law’s infidelity. The French barred Edward from the French throne by reverting to Salic law, that is the laws which covered the Frankish nation before the rise of Clovis—the Salty Franks.
The two of the wives who were found guilty of adultery—Margaretha of Burgundy and Of Burgundy— were sentenced to life imprisonment and died in custody. Jeanne of Bourgogne was found not guilty.
However despite her mother being found guilty of adultery Juana was eventually allowed to assume the role of Queen of Navarre.
Salic law,—which may or may not have ever existed—stipulated not only that a woman could not succeed to the Frankish throne, but that no malel could make a claim if it was dependent on his descent from a woman.
Phillipe VI was “elected” as the rightful heir after consideration of this Salic law.
He was the son of Charles III de Valois, Charles was the younger brother of Phillipe IV—son of Phillipe III,