Name would not be enough to stop me from using it but TiddlyWiki absolutely sounds stupid. It's probably a play off "tiddlywinks" but that also sounds stupid. It's something I'd cringe saying. I might unabashedly type out my recommendation with the name to a friend or send a link to it, but would try to dodge saying the name in an in-person conversation.
This hurts spread. One of the primary ways I find new software is by word of mouth from friends in-person (somehow I have an easier time ignoring or brushing off suggestions that are texted to me, and I take ones made in-person more seriously. I have no idea why), and I usually end up sticking with whatever they recommended.