TiddlyWeb, the name, was chosen by ChrisDent. Originally the concept that became TiddlyWeb was named "möass": Mother of All Server Sides. That didn't seem like it fit in the Tiddly* universe all that well. Because TiddlyWeb tries to be very good about how it follows web standards and practices, TiddlyWeb seemed like a good name.

http://tiddlyweb.com/ provides a starting page for all things TiddlyWeb.