King Maha Vajiralongkorn of Thailand

King Maha Vajiralongkorn of Thailand, the richest monarch in the world, has a net worth between $30 billion and $45 billion. He succeeded his father, King Bhumibol Adulyadej, and has seven children from his former wives. His youngest daughter, Princess Sirivannavari Nariratana Rajakanya, is a fashion designer and the only child still part of the royal family. The king's current wife is Queen Suthida Bajrasudhabimalalakshana, whom he married in 2019.