It's interesting to see how much one can discuss around a name... ;)
When my `tumme' (now `image-dired') package was added to Emacs many moons ago, the question about its name came up. Since I was the author and the one who had picked the name ("tumme" means thumb, in Swedish, so it was a good name for a package aimed at working with image thumbnails), and it also had been used by people for a while, I felt... something (a small disturbance in the force, maybe)... when the name change came up.
However, the arguments back then was about the same as now; it is beneficial if users can find commands by guessing and it was reasonable to assume that someone might try typing "image" to see what nice commands there might exist for working with images. Also, since I was glad/proud that someone asked if this could be included in Emacs, my favorite piece of software, it was a small thing to change the name. And, I see now, the name "tumme" is still there in the form of an alias for one of the commands in the package.
So, that was my little insignificant story...