It depended on the situation. In some novels, authors may use the same main character's name because these names are already widely used or to highlight the similarities between the characters. In this case, it was not necessarily plagiarism. However, in some original novels, if the names of the main characters were very similar, it might be considered plagiarism. This was because readers might misunderstand that these novels were plagiarized from other works. Therefore, if the names of the protagonists in the novels are similar, it is recommended to clarify and explain when writing to avoid being considered plagiarism.