During his tenure as senator he drafted the bill that in 1935 renamed the Dominican capital,
Santo Domingo, Trujillo City in honor of dictator
Rafael Trujillo;[2][3] he also promoted in 1943 the construction of
Centro de Los Heroes in the capital city.
Family
Cabral y Báez was the son of
Marcos Antonio Cabral y Figueredo and Altagracia Amelia Báez Andújar (daughter of President
Buenaventura Báez). On 24 November 1900, Cabral y Báez married Amelia Josefa Tavares Saviñón and they had four children: María Estela, Pura Amelia,
Manuel Antonio and Ramón Cabral Tavares. After his first wife died, Cabral y Báez married María Josefa Tavares Tineo and they had one daughter, Altagracia Amelia Cabral Tavares. With Sixta América Stéfani, an Italian-Dominican, he had another daughter, Dulce Enilda Altagracia Cabral Stéfani (1925–2008).
Ancestors of Mario Fermín Cabral y Báez
16. Marcos Cabral Valera (†1838) Hincha, Colony of Santo Domingo
8. Juan Marcos Cabral y Aybar (1792–1853) Hincha, Colony of Santo Domingo
17. María Aybar de Luna Hincha, Colony of Santo Domingo