4. Tatiana Ellinka Blatnik the Princess of Denmark and Greece (Net worth – $2.2 Billion) – Princess Tatiana was born on 28th August 1980 in Caracas Venezuela. This 35 year old is the wife of Prince Nikolaos of Greece and Denmark. She was a descendant of Prince William II but had a very normal upbringing and worked as a event manager for Diane Von Furstenberg. She got married to the prince in 2010 in a royal wedding. On her marriage she was conferred the title of Royal Highness and is now known for her charitable works.