The question of whether or not Marques Brownlee has a daughter is a matter of public record. If he does have a daughter, it is likely that he will eventually share the news with his fans. However, until then, it is best to respect his privacy and not speculate about his personal life.
Brownlee's decision to keep his personal life private is a reminder that everyone has the right to privacy, regardless of whether or not they are a public figure. We should respect his decision and not speculate about his personal life, including whether or not he has any children.
We can all learn from Brownlee's example and strive to be more private in our own lives. We do not need to share every detail of our personal lives with the public in order to be successful.