Emir Khalifa bin Zayed Al Nahyan

Sheikh Khalifa bin Zayed Al Nahyan, president of the United Arab Emirates from 2004 to 2022 and emir of the constituent emirate of Abu Dhabi from 2004 to 2022.

Khalifa's father was Sheikh Zayed bin Sultan Al Nahyan, ruler of Abu Dhabi and head of the Nahyan dynasty from 1966 to 2004, and president of the United Arab Emirates from 1971 to 2004. Emir Khalifa grew raised in Al-Ain, one of the emirate's most important cities, and became his father's official envoy to the region after his father became emir in 1966.

However, his fortune stems from his position as chairman of the Abu Dhabi Investment Authority, which controls the UAE's surplus oil and is believed to be worth half a trillion dollars. His half-brother also owns Manchester City FC, and the Sheikh is said to own a lot of real estate in London. However, he is most recognized for his generosity.

Country: Abu Dhabi, UAE
Estimated net worth: $18 billion