gnuplot is not related to the GNU project or the FSF in any but the most peripheral sense. Our software was designed completely independently and the name “gnuplot” was actually a compromise. I wanted to call it “llamaplot” and Colin wanted to call it “nplot.” We agreed that “newplot” was acceptable but, we then discovered that there was an absolutely ghastly pascal program of that name that the Computer Science Dept. occasionally used. I decided that “gnuplot” would make a nice pun and after a fashion Colin agreed.

http://gnuplot.info/faq/index.html#x1-70001.2

So another punny name that was picked when it was assumed it didn’t matter since no-one would really use it.

And yet still, Stallman chose to add gnuplot integration into GNU Emacs. Checkmate atheists.

I Hurd that before.