Most C++ naming conventions dictate the use of camelCaseIdentifiers: names that start with an uppercase letter for classes (Person, Booking>
In the projects I am working on I follow to code conventions for my project. When I call something other I use API of that library.
I also would add that wrapping of library is a bad idea (there are a lot of them in the code base I am working on) because it is usually done by the developer who solve his own problem and as a rule it is inappropriate for usage by all other developers. From the other side high quality wrapping is expensive.