Iris Fontbona and Family - $17.4 billion

Chilean businesswoman Iris Fontbona has an estimated net worth of $17.4 billion according to Forbes. Fontbona acquired her wealth when she married Andronico Luksic, founder of Antofagasta, one of the largest copper mining companies in the world. She also owns a majority stake in Quinenco, a consumer packaging maker. The company also has interests in Banco de Chile and in energy, transportation and port services.