The answer really depends on the likes of the players, the parents, and the sponsoring club. A group of U-10 boys might not be the PowerPuff Girls, nor would a U-10 girls team likely be the Rambo Ninja Assassins. It's a matter of taste. The hardest part is often finding a team name that everyone involved likes, but isn't already in use by other teams in the club, league, or association.
Many youth teams start out with some generic name. For example, a team from the Whitefish Bay Soccer Club (a town in Wisconsin) might start being called "WFB Red", and later adopt a better name as the team grows into its own personality.
If you are intent on devising a team name before really getting things going, consider the following suggestions:
Whatever you decide, be sure to clear it with your league or association before you get your heart set on it and certainly before your players do. Come up with several options before approaching the league or association, so you're more likely to have more options when you and your players (or their parents) decide on a name.
If you're just looking for someone to tell you what to name your team, go with Tigers. They're fierce, loyal, powerful, agile, and intelligent hunters, and even are the mascot for a popular breakfast cereal!
The red and white bulls
because they're cool like that
a cool name for a hockey team is iceburgs cuz its on ice
Bayern Munich
white
The Argentinan football team are called the Pumas.
the team colors a blue and white (there flag colors)
Your wrong it's futbol
oswalda sanchaz
Team Testosterone
Algeria is cool. They nearly beat crappy team named "england"
Choosing a cool team name relies a lot on the type of team it is. Crazies, Cougars, Coyotes, Crabs, Courageous Ones, and Cubs are all good team names.