I don't know why the name 'chromium' was chosen, but I doubt it has anything to do with Adrenochrome. I've used Brave a bit, it seems a bit buggy to me and I'm not sure if I'll be able to move over to it.. It has some design decisions that make it a bit of a pain for me to use. If it truly doesn't connect to Google as often as Firefox or even Chromium does, then it's a good choice for privacy though.