Případ Galadriel

Fictional anthroponyms in literature are mostly based on real names or they are inspired by them. However, real onymic system is influenced by fictional names as well. This fact can be documented by a fashion of naming babies according movie or literature characters. Some fictional anthroponyms can become official (for example Jessica is a proper name created by W. Shakespeare). There is a question – what shall we do if someone wants to name a baby by a fictional name such as Galadriel from the Lord of the Rings by J. R. R. Tolkien? Czech law does not allow naming by name which is not documented as real and official. But is it right or not?