Since we don't have details, it could be a story about a child who died in a natural disaster. Or it could be a more complex social issue - related story, for example, a child who passed away due to neglect or abuse. It could also be a story of a heroic kid who unfortunately lost their life while trying to do something good, like saving someone else from danger.
A prevalent theme is often the impact on the community. When a child dies, it shakes the entire community. People come together to support the family, and there may be changes in the community as a result, such as increased safety measures if it was an accident - related death. Also, there's often a sense of loss of potential. A child has so much future ahead, and when that's cut short, it's a very sad aspect of these stories.
Most likely not. Many works with titles like that are created for entertainment and not based on real events. It could be a fictional story crafted to engage the audience.
Yes, Billy the Kid was a real person. He was a notorious outlaw in the American Old West. His real name was Henry McCarty, and he was involved in various criminal activities, including cattle rustling and murder. His life and deeds have been the subject of many stories and legends.
I have no clear idea. To figure out who the kid is, we'd need more information about the true story. It could be a protagonist, a witness, or someone whose actions had an impact.