What I find interesting about the name of open source software is that there is nothing in the licenses about repackaging and renaming the product.
In early years - ‘Java’ has been named - GreenTalk, Oak, Silk, among others. Around 1990? ‘Oak’ was the name that was wished by Sun Microsystems as had a positive international vibe being the national tree of many countries - Well rooted, strong, expansive, branching, etc. A few years later… trademark violation! Then became ‘Java’.
Smalltalk by Alan Kay went through similar renaming and variations of which many still exist. Smalltalk, Squeak, Pharo. Going from ‘Squeak’ to ‘Pharo’ was very similar to the debate of TiddlyWiki’s name. ‘Pharo’ is much more professional sounding.
So if you do not like the TiddlyWiki name - then in your implementation of TiddlyWiki you can name it anything you want. You must must retain the TiddlyWiki copyright notice, and you can not say that your implementation is endorsed unless permitted by Jeremy/UnaMesa.
I am not a lawyer, so above may not be that simple.
I know Jeremy is very interested in community discussion and debate - But realistically, he invented it, built the foundation, promotes, guides, and whole hardheartedly supports it. As a community we should give him the respect to let him name it whatever HE wants!