Names will usually reveal a lot about your characters, so to pick the best name, your going to need to put into consideration your characters’ backgrounds. For example, an American and an Arab kid are less likely to have the same names. It’s bc they come from different worlds.
Since this is connected to christmas, I’m guessing some common names like Peter, John, James, Rose, Jordan, Williams, Jessica, Jeff/ Jeffery, Karen, Smith, Greg, Sam, Simon, Lauren, Lily, or less common names, Florence, Williston, Rodessa, Adolf, Day, Dewey, etc. might work.
I recommend checking out a name generator too, there are plenty online and they’re better than me at suggesting names. Here’s a nice one I found:
If you plan on turning this into an animation, I recommend writing it like a script, and creating a storyboard that goes with it before animating.