The real name of Scout depends on which fictional character you're referring to.
Here are some possibilities:
- Scout Finch from Harper Lee's To Kill a Mockingbird: Her real name is Jean Louise Finch.
- Scout from the video game Team Fortress 2: His real name is Jeremy.
- Sc0ut, the PUBG player: His real name is Tanmay Singh.
The name Scout is a popular nickname, and it's important to specify which character you're asking about to get the correct answer.