The law has provided for the possibility of making a request for a change of name for legitimate reasons. This implies that your name sounds ridiculous or pejorative, or that it sounds foreign, or that it is attached to a known person, or that this name is on the verge of extinction.
It is the same for the first name, even if the procedures differ: the first involves the seizure of the Keeper of the Seals or the Prosecutor of the Republic ; while the second takes place before the Family Affairs Judge.
Your lawyer will be able to advise you on the approach to adopt and the chances of success of your request.