By Jennifer Newton He may only be five years old but as the youngest child of the Prince and Princess of Wales, Prince Louis could be in line for an impressive title. He is officially known as His Royal Highness Prince Louis of Wales and is currently fourth in line to the throne behind his father Prince William and older siblings Prince George and Princess Charlotte. But it seems his title could end up changing once he becomes an adult – and he could end up with one that is already very familiar. That’s because last year, it was confirmed thatKing Charles had conferred the title of Duke of Edi…