Creating brand name is like named you children, put something big in their name. You can get brand name by generating it, maybe you can try this website.
https://hostingfacts.com/15-best-domain-name-generators/
I used these services (almost all of them). It was still a nightmare to find a good name which I like and also sounds good and can be good for a brand name.
Good luck tho, I think this is one of the hardest thing in the beginning - to find a good name. But it’s also not that important, I should say this.