7.Sheikh Hamad bin Khalifa  Al Thani – Emir of Qatar ($2.4 Billion )
Sheikh Hamad bin Khalifa bin Hamad bin Abdullah bin Jassim bin Mohammed Al Thani born 1 January 1952) is a member of the ruling Al Thani Qatari royal family. He was the ruling Emir of Qatar from 1995 to 2013.The Qatari government now refers to him as His Highness the Father Emir.
6. Hans-Adam II – Prince of Liechtenstein (Net worth: $3.5 Billion)
Hans-Adam II (Johannes Adam Ferdinand Alois Josef Maria Marco d’Aviano Pius; born 14 February 1945) is the reigning Prince of Liechtenstein. He is the son of Franz Joseph II, Prince of Liechtenstein (1906–1989) and his wife Countess Georgina von Wilczek (1921–1989). He also bears the titles Duke of Troppau and Jägerndorf, and Count Rietberg.