Fidel Ángel Castro Díaz-Balart was a Cuban nuclear physicist and government official.
Frequently known by the diminutive
Fidelito, he was the eldest son of Cuban leader Fidel Castro and his first wife, Mirta Díaz-Balart. Wikipedia
Born: September 1, 1949, Havana, Cuba
Died: February 1, 2018 (age 68 years), Havana, Cuba
Children: Fidel Antonio Castro Smirnov and José Raúl Castro Smirnov
Spouse: María Victoria Barreiro (m. ?–2018)
Siblings: Alina Fernández, Jorge Angel Castro, and Francisca Pupo