Algeria: Issad Rebrab
Net worth: $3.8 billion
Percentage of country's GDP: ~2.1%
Source of wealth: Food
Rebrab is the founder and CEO of Algeria's largest privately-held company, Cevital, which owns one of the world's largest sugar refineries. The company also owns an Italian steel mill, a French appliances maker, and a German water purification company.
All five of Rebrab's children work at Cevital.
Angola: Isabel dos Santos
Net worth: $2.2 billion
Percentage of country's GDP: ~2.0%
Source of wealth: Investments
Dos Santos is the oldest daughter of Angola's former president, Jose Eduardo dos Santos, who left office in 2017. According to Forbes, Dos Santos acquired stakes in Angolan companies like banks and a telecom firm during her father's presidency.
Georgia: Bidzina Ivanishvili
Net worth: $4.9 billion
Percentage of country's GDP: ~30.2%
Source of wealth: Investments
Ivanishvili amassed his fortune in Russia in the metals and banking industries before moving back to Georgia in 2013. He served as Georgia's prime minister for 13 months in 2012 and 2013.
Iceland: Björgólfur Thor Björgólfsson
Net worth $2.2 billion
Percentage of country's GDP: ~ 8.5%
Source of wealth: Investments
Björgólfur Thor Björgólfsson began to amass his fortune in the Russian beer industry, cofounding Bravo brewery and creating the Botchkarov beer brand.
He has investments in Polish and Chilean telecom companies, cryptocurrencies, and startups including Zwift, BeamUp, and Deliveroo. Björgólfsson went almost completely broke during the 2008 recession when he had to pay off more than $1 billion in debt.
Kuwait: Kutayba Alghanim
Net worth: $1.4 billion
Percentage of country's GDP: ~0.9%
Source of wealth: Diversified
Alghanim is the chairman of Alghanim Industries, a conglomerate founded by his father in the 1930s. The company sells General Motors and Ford cars in Kuwait and owns other businesses, including Wendy's restaurants in the Middle East.
Liechtenstein: Christoph Zeller
Net worth: $3 billion
Percentage of country's GDP: ~48.2%
Source of wealth: Dental products
Zeller is the former CEO and now a supervising board member of Ivoclar Vivadent AG, a Lichtenstein-based dental products company with offices in 25 countries. Zeller's grandfather, Dr. Adolph Schneider, bought the company in 1948. Zeller served as CEO from 1990 to 2003.
Nepal: Binod Chaudhary
Net worth: $1.7 billion
Percentage of country's GDP: ~5.9%
Source of wealth: Diversified
Chaudhary holds a controlling stake in CG Corp Global, which makes the popular Wai Wai noodles, owns 30 hotels, and manages 55 more.
His two sons help him run the company.
Portugal: Maria Fernanda Amorim
Net worth: $4.9 billion
Percentage of country's GDP: ~2.0%
Source of wealth: Energy, investments
Amorim was married to Americo Amorim. After he died in 2017, she and her three daughters inherited his fortune, which was made in the family's cork business, Corticeira Amorim, as well as international investments in energy and banks.
She has an estimated 18% stake in Galp Energia, a Portuguese oil and gas company.
Qatar: Faisal Bin Qassim Al Thani
Net worth: $1.2 billion
Percentage of country's GDP: ~0.6%
Source of wealth: Hotels, diversified
Al Thani is the founder and chairman of Al Faisal Holding, one of Qatar's largest conglomerates, which owns more than 20 hotels worldwide, including the St. Regis in Washington, DC and Miami, and the W Hotel in London.
His company also holds a majority stake in Aamal, which sells medical supplies and pharmaceuticals and owns real estate in Qatar.
Romania: Ion Tiriac
Net worth: $1.1 billion
Percentage of country's GDP: ~0.4%
Source of wealth: Banking, insurance
Tiriac has a minority stake in Romanian insurance company Allianz-Tiriac and has also made investments in automobile dealerships, petroleum, and real estate.
Eswatini (formerly Swaziland): Nathan Kirsh
Net worth: $5.3 billion
Percentage of country's GDP: ~112%
Source of wealth: Retail, real estate
Kirsh owns 70% of Jetro Holdings, a wholesale supplier of goods to small stores and restaurants.
He's also invested in commercial property development.
Tanzania: Mohammed Dewji
Net worth: $1.9 billion
Percentage of country's GDP: ~3.3%
Source of wealth: Diversified
Dewji is the CEO of METL, a Tanzanian conglomerate that deals in textile manufacturing, flour milling, beverages, and edible oils in at least six African countries. His father founded the company in the 1970s.
Dewji signed the Giving Pledge in 2016, promising to give at least half his wealth to charity.
In October 2018, he was reportedly kidnapped at gunpoint and held for nine days.
Zimbabwe: Strive Masiyiwa
Net worth: $2.8 billion
Percentage of country's GDP: ~9.0%
Source of wealth: Telecom
Masiyiwa is the founder and 50% owner of mobile network Econet Wireless Zimbabwe.
He also owns more than half of Liquid Telecom, a private company that supplies fiber optic and satellite services to telecom companies throughout Africa.
