Naming companies is hard. At Monzo we had to change the original name after an annoying trademark dispute.
So we launched a fun little side project that sells cheap .com domains that would make good startup names.
They are unique, short, easy to say and don't mean anything, so you can fill them with meaning - just like Google or Twilio did.
You can check it out here: https://garple.com
I hope it's useful!