What are the wealthiest families in the world?

What are the wealthiest families in the world?
The wealthist families in the world are:
1. Rothschild
2. Rockefeller
3. Windsor
4. DuPont
5. Vanderbilt
6. Krupp
7. Kellogg
8. Goldman
9. Wrigley
11. Al Saud
12. Li
13. Cowles-Hammett