Its not just the US judiciary that presume to restrict parental choice of name for their sprogs.
In NZ they have a dynamic list of inappropriate names, which parents are not allowed to use;
http://newsfeed.time.com/2013/05/02/new-zealand-updates-banned-baby-names-list/
And Messiah is banned downunder as well, it would seem. From that article, it suggests that Germany and Iceland also reserve the right to band certain names from being used.
Not sure what I think about it. Not keen on Governments banning things that might be related to free speech issues, but I can see the argument about potential problems for a child lumbered with a ridiculous name throughout their childhood.I am less convinced that this was the judges only reason for banning this particular name; Her judgement at least in part seems to have been driven by her own Faith.