Another one that I've heard that I'm rather skeptical of (but, I don't know, might be true) is that the toilet was invented by someone with the last name 'Crapper', hence that term comes into our language. But again, that might just be an urban legend of history. (I looked it up and... the myth is that he invented the flush toilet, which he didn't... but he was a plumber, heh. Poor guy.)
Ah yes, good ol Thomas Crapper (though sometimes I've heard him with the name of John Crapper, for the double hit). He didn't invent the flushable toilet, but another story goes that he manufactured them and put his name on them (basic branding). American soldiers who traveled to Europe in WWI saw it and thought that Crapper was the name of the device, not the name of the guy who made them. Still, even that is rather dubious. However, "crapper" is originally an american term, so there might be some odd connection there.
Another fun, but dubious, bit of "history" is how the paper industry got started in Europe. Legend goes that it was made possible by the underwear business, which boomed shortly before paper came into high demand. With a lot of discarded undergarments, industrious manufactures took those, beat them into a pulp, and made fine linen paper out of them.