In Nintendo's early playing card manufacturing days, they carried a number of different brand names and trade marks. It's a familiar marketing tactic used to gain market share.
A key brand was Napoleon, named after the French 19th century emperor Napoléon Bonaparte.
Other brand names used at the time by Nintendo were Standard and Victor.
In the first decades of the company, Nintendo took inspiration from more established playing card manufacturers abroad, in particular from the United States. This included copying card designs, absorbing expertise, as well as re-using existing brand names.
It is not known if this happened with the full consent of the other companies, as part of business deals or partnerships, or if this was an act of creative 'borrowing' or straight-up plagiarism. Fact is that a manufacturer named The Standard Playing Cards company existed in the United Stats already before Nintendo was established, and it appears that American companies also used the Napoleon name, possibly referring to the card game with the same name.
An interesting article, in Japanese, on this somewhat hazy part in Nintendo's history can be found here.