Yes, virtually certain rubbish, but still fun. :)
The conventional story is that the FC evolved with the shirt, starting somewhere in the 13th century.
However, I do not understand why, once the (sewn) buttons proliferated as means to fasten shirts (and any other clothing), the French Cuff persisted till now, rather than just follow the rest of the fastening innovation :)?
Perhaps it is a residue from the time when cuffs and collars used to be detachable -...