Ruth Fernández was a Puerto Rican contralto and a member of the Puerto Rican Senate. According to the "Comisiones Nacionales para la Celebración del Quinto Centenario" (National Commission for the Celebration of the Fifth Centennial), she is said to be one of three artists whose contributions have helped unite Latin America. The other two artists named were Libertad Lamarque from Argentina and Pedro Vargas from Mexico.

Cuarto is one of the 31 barrios of the municipality of Ponce, Puerto Rico. Together with Primero, Segundo, Tercero, Quinto, and Sexto, Cuarto is one of the municipality's six core urban barrios. It was created in 1878.