Business names cannot be legally copyrighted. Any name is fair game. As long as it does not confuse people. Even if it is the exact name but marketed for a different product in a different way and different market.

Just don't use a little yellow ghost as your business logo and you'll be fine.

I wouldn't worry too much about it. This post makes a good case https://www.quora.com/Is-the-term-snaps-legal-proprietary-to-Snapchat-If-so-how-would-you-go-about-asking-them-to-use-it

Assume nothing!!!!

Ask them and get permission in writing from someone that has the authority to give you permission. If they refuse, change your name.

I've had experience with larger companies sending threatening legal letters, it's not fun and it's a waste of time.