There isn't a specific law that universally requires individuals to have a name, but names are a fundamental part of legal identity in many societies. Most legal systems require individuals to have a name for purposes such as identification, legal documentation, and civil rights. For example, when registering a birth, a name is typically required for the birth certificate. Additionally, having a name is important for various legal processes, such as obtaining a driver's license, passport, or other forms of identification.

In some cultures, individuals may have the option to choose their names or change them, but the existence of a name is generally necessary for legal and administrative purposes.