The similarity of the protagonist's name in a novel does not necessarily violate the reputation of others. It depends on the degree of similarity and whether the plot in the novel respects the intellectual property rights of others. If the name of the protagonist in the novel was highly similar to the real person or the plot involved plagiarism, plagiarism, or other acts that violated the intellectual property rights of others, then it might violate the reputation of others. In this case, the author had to bear legal responsibility and apologize to the victim and compensate for the loss. However, if the name of the protagonist in the novel is less similar to the real person, or if the plot in the novel is based on the story, creativity, or inspiration of others, then it does not necessarily violate the reputation of others. In this case, the author was still free to use the protagonist's name without worrying about legal issues. When writing a novel, the author should pay attention to avoid violating the intellectual property rights and reputation rights of others, protect the rights and interests of others, and at the same time maintain his own freedom and legitimacy of creation.