The product was introduced at the same time in both New Your and London and many people think the name was from that. The two cities combined as New York and London. Resulting in the trade name NYLON. Nice story, but according to the DUpont company it isn't true.
Another suggestion is that it can from the term No-Run. Since nylons are NOT a no-run product this story makes no sense. The suffix "on" comes from the natural product cotton and the synthetic product "rayon".
Like many trade names the term "nylon" is a made-up and part of the efforts of the Dupont marketing department. It was chosen precisely because it was a made up, making it eaiser to defend in trademark infringement lawsuits.
Dupont followed up the World's Fair introduction with many print ads in all of the popular newspapers and magazines.
