The World’s Top 15 Richest Royals updated for 2017 Thailand’s deceased King Bhumibol Adulyadej tops the list with an estimated wealth of $30 billion, according to Forbes. 15) King Mswati III of Swaziland – $100 million The Swaziland King is worth $100 million according to Forbes; down $100 million of his fortune. The last monarch … Continue reading Top 15 Richest Royals in the World