I really don’t doubt Narmer. But some here want outside mention, which seems like a reasonable level of verification.
Dr Deth, I think you are playing Devil’s Advocate. If we’re going to doubt the Egyptologists, who may be relying on documents that aren’t exactly contemporaneous, we should also hold with a grain of salt the text-recension scholars who claim that the Gospels were written in the 1st century. The earliest fragment known, after all, dates to 125, and other than old P52 there are only two Gospel papyri from before 250. Why your double standard? Why does NT textual and paleographical scholarship based on later material remains get a pass while whatever Egyptologists do is so sketchy and unreliable? If we want to be that skeptical, then we could argue that the existence of Napoleon Bonaparte is no more certain than the existence of Frodo Baggins.