[angelah]

It's a great idea to check this first. Here's a suggestion:

1. Go to The Blue Alliance (previously linked) and type in the search bar any team names you are thinking of.
2. For each team, check to see if they are still around.
3. Then check to see if they are local (would you be likely to attend the same event.)
4. Find the name that is the most unique after this research, but also fits your needs.

I know some teams need to use a school mascot, but attending an event with three teams with the same name is weird. It's also awkward when a new team (accidentally?) names themselves after an old established team. It's smart that you are thinking about this!