Having only a single field for the entire name should be the norm all across the world. Automated systems can call people by their full name ("Hello, Bob Lemon").
It's gender neutral, solves sorting issues (e.g. Japanese), people without surnames (e.g. some African tribes, iirc) and whatnot.
Until you have people who get a yearly bonus. Or 13 or 14 monthly salaries a year, which is quite common in Germany (basically a bonus, but the employee is entitled to it).