When they turn 18 they are adults and can change their name to whatever they want (within reason, i.e. not something controversial like Osama Ben Laden or Jesus Christ or whatever) but otherwise they can do so, but they have to do it in court, and they do not have to give you or your x notice - they have to publish notice in a newspaper of general circulation. every court house has a change of name procedure they can follow.
Answered on Mar 02nd, 2016 at 4:12 AM