According to relevant records, the ancestor of ghost surname is indeed a psychic mage. In the Spring and Autumn Period and the Warring States Period, psychic mage was a very popular profession, because people believed in divination and so on. But when Buddhism was introduced to China in the Sui Dynasty, the profession of psychic mage became less and less, and ghost surnames became very rare. Anyway, I have never met a ghost surname until now, but I think there is another possibility that this surname is not acceptable.
But I think it is a last resort, because surnames are very important to us both in ancient and modern times and cannot be discarded. As the saying goes? Family with the same surname? It represents the division of lineages. If it wasn't for life, who would choose to change their surname? In fact, in addition to the ghost surname, there is also a rare surname, which is the fifth surname. This surname sounds strange, not even like a surname at all, but it is.
Moreover, it is also recorded in "Hundred Surnames", which is located at the last place of the hundred surnames. In fact, its history is longer than the ghost name. It's a little strange, at least it doesn't sound scary, but so far I haven't met anyone with a fifth surname. After all, compound surnames are rare.