Born in 1929 in Tunuyán fourteen and entered the Academy of Fine Arts where he studied painting with Mendoza Ramón Gómez Cornet. In 1954 he traveled to Europe, where he exhibited in Paris and Madrid. After the coup of 1976 and the disappearance of his daughter Paloma following year, Alonso was exiled to Italy, and in 1979 he moved to Madrid. Two years later he returned to Argentina.
In 1951 he won first prize at the Salon of Painting San Rafael (Mendoza), the North Hall (Santiago del Estero) and drawing in the North Hall (Tucumán). In 1957 he was the winner of the contest sponsored by the publisher Emecé to illustrate the second part of Don Quixote and Martin Fierro (1959), and two years later won the Hall of Watercolorists Chantal Recorders and Buenos Aires.
His works have been exhibited in numerous exhibitions, including: the Art Gallery International (Buenos Aires), where, in 1967, introduced some 250 works referred to as Dante's Divine Comedy, the Museo Nacional de Bellas Artes (Mexico), and the Museum of Art in Havana (Cuba), where an exhibition of tapestries and collages. In 1971 he exhibited at the Italian galleries Eidos Giulia in Rome and Milan, as well as in the Bedford Gallery in London. In 1990 and 1995 he exhibits at the National Museum of Fine Arts and other galleries in the country.