Brazilian-born Saverin is the new No.1 in the ranks of Singapore's richest. : Billionaire Eduardo Saverin, the Facebook co-founder, who became a Singapore resident after renouncing his U.S. citizenship in 2012, is now the island-nation’s richest person. With an estimated net worth of $10.1 billion, Saverin, 35, edged past property siblings Robert & Philip Ng, who have occupied the top spot as Singapore’s richest since 2010 and have an estimated fortune of $10 billion.