"Thunder" was the code name that Microsoft adopted for Ruby/VB early on. Its tagline was "The Power to Crack Windows".
As you know, window class names existed in a global namespace, so you needed some kind of hopefully-unique prefix or something to avoid collisions.
Did you ever happen to see an early VB version with "GSK_" prefixes on window class names and such? My colleague Gary S. Kratkin developed much of the forms editor, so he used his initials as the disambiguator.
It was a tradition back then to use your initials like this. Mark Zbikowski may be the most famous example. To this day, every Windows EXE file begins with his initials.
https://en.wikipedia.org/wiki/DOS_MZ_executable
Here is an article from Scott Ferguson about Thunder:
https://www.forestmoon.com/birthofvb/birthofvb.html
And a great long-form article from Ryan Lucas of Retool:
https://retool.com/visual-basic
For the curious, that article has the origin story of "fire an event".
I also want to mention Frank Raab and Mark Merker, who both did a ton of work on Ruby, and of course Alan Cooper gets credit for coming up with the idea and developing his Tripod prototype.