Cuban socialist leader who overthrew a dictator in 1959 and established a Marxist socialist state in Cuba (born in 1927)
"Fidel Castro led the revolution that toppled Batista's dictatorship and founded a communist government in Cuba."
A surname, from Spanish.
"Fidel Castro was the former leader of Cuba whose last name is a common Spanish surname."
The word comes directly from the Spanish name of a historic neighborhood. That neighborhood was named in honor of the 19th-century Californio politician José Castro.