Unfortunately, this type of logic is not available in the functionality of Visual Studio. Naming both names is the best you can do.
Here are just the "functions" available to you when creating a piece of code. MSDN Code Snippet Functions
Products such as Resharper provide superior code functionality (called "Resharper Templates") with the ability to change the wrapper of other notes within a snippet, among many other useful features. Resharper Template Information
For example, you will be interested in this macro:
"The value of another variable with the first character in lowercase
source share