The entry for Carmen says that it is a variation of Carmel, which does have a meaning associated with hills. It only says that the spelling was influenced by the Latin for 'song'. And it merely mentions that Carmen is the main character in a Bizet opera. Follow the Carmen and Carmel hyperlinks for these details.
So the next time you decide to go around abusing a web site, please check your facts! This is an extremely reliable and well-researched site.