Meet the Five Richest Kings in Africa, two of them are Nigerians

Forbes Africa just released their list of the richest Kings in Africa and two Nigerian monarchs make the list - at No.2 and No.3. See the list below...
1. King Mohammed VI, Morocco Estimated net worth: $2 billion Source: Investments 
2. Oba Obateru Akinrutan, Ugbo Land, Nigeria (pictured left) Estimated net worth: $300 million Source: Oil
3. Oba Okunade Sijuwade, Ile-Ife, Nigeria (pictured right) Estimated net worth: At least $75 million Source: Construction, Property, Oil 

4. King Mswati III, Swaziland Estimated net worth: At least $50 million Source: Investments 
5. Otumfuo Osei Tutu II, Ashanti, Ghana Estimated net worth: $10 million Source: Mining Equipment, Property, Jewelry