3Cayetana Fitz-James Stuart – Net worth – $4.9 billion
On #3, with a net worth of almost $5 billion, we have Cayetana Fitz-James Stuart, best known as the 18th Duchess of Alba de Tormes.
Born on March 28, 1926, the 88-year-old billionaire is the current head of the House of Alba.
She comes from a rich and well known family. She is the only child of Don Jacobo Fitz-James Stuart y Falco, the 17th Duke of Alba and Dona Maria del Rosario de Silva y Gurtubay, the 9th Marquise of San Vicente del Barco.
And her godmother was Queen Victoria Eugenia of Spain.
An amazing fact about this woman is that her property is 170 times the size of Monaco.
After losing her first husband, Luis Martines de Irujo, Cayetana Fitz-James Stuart spent time with many matadors and flamenco dancers, but eventually married an ex-priest, Jesus Aguirre.