5. Al Thani Family

• Estimated Wealth: $133 billion
  
  Company: Royal Family of Qatar
  
  
  The Al Thani family has ruled Qatar since the middle of the 19th century. The family's reign has lasted through the founding of modern Qatar, wars, and two coup attempts.
  
  Sheikh Hamad bin Khalifa Al Thani turned Qatar into a major world power during his 18 years in power. (He gained complete power of Qatar by deposing his father in a bloodless coup in 1995. This involved freezing all of his father's assets to prevent any counter-coups.)
  
  The country's natural gas production skyrocketed as a result of mining offshore gas fields and the discovery of untapped oil fields. In 2010, the average income in the country was $86,440 a year per person.
  
  In addition to his income made from oil and gas, Sheikh Hamad invested billions of dollars in businesses, including Volkswagen, Total, Sainsbury’s, and Barclays bank. In 2018, Sheikh Hamad abdicated the throne to his fourth son, Sheikh Tamin bin Hamad al Thani