- Born in Porto Alegre (Rio Grande do Sul, RS, State), on February 13th, Ernani Gnattali , Radamés’ brother.
Radamés and Ernani.
- The Escola de Belas Artes (Fine Arts), was founded in Porto Alegre, where Radamés concluded his piano studies, in 1924.
- Born in Porto Alegre (Rio Grande do Sul, RS, State), the violin player and composer Luís Cosme , part of the Henrique Oswald Quartet, in the mid-twenties, in Porto Alegre, Capital of Rio Grande do Sul State, with whom Radamés was the viola player.
- Born in Rio de Janeiro (Rio de Janeiro, RJ, State), the singer and radio man Admiral (Henrique Foréis Domingues), known as “the major patent in the radio”, who strengthened the top musical producers at the National Radio, during the forties and the fifties, with Haroldo Barbosa, José Mauro, Paulo Tapajós and Radamés.
- Born in Rio de Janeiro (Rio de Janeiro, RJ, State) the percussionist Luciano Perrone , first Brazilian instrumentalist to systemize and transpose the rythm of the Samba Schools into drums. Radamés has dedicated to him the Brasiliana Nº2 (Samba in three movements), among others.
- The singer, composer and popular poet Catulo da Paixão Cearense performs a controversial audition of popular music, at the National Institute of Music, in Rio de Janeiro, supported by maestro Alberto Nepomuceno, criticized by the more conservative wing of musician community.
- San Diego (California/EUA) presented the first Broadcast from a Radio Station in the United States.
- The Brazilian Confederation of Brazilian Workers, sympathizers with the anarchism  breaks out further to the First Workers Congress, in 1906.
-  Ernani Gnattali (1908–1968) studied piano with his mother very early. He’s fallen in love with the violin though, and has dedicated to his cousin Olga Fossati’s instrument. His musician brothers used to say that he played very well, but he never became a real professional instrumentist. He worked as a copyist at the National Radio for 20 years but in 1960 he moved to a Federal Public Administration career.
-  Luiz Cosme was a great Radamés’ youth friend. Read more: http://www.abmusica.org.br/academico/luiz-cosme/
-  Luciano Perrone (Rio de Janeiro, 1908-2001) and Radamés Gnattali have met in 1929, at a resort area in Lambari, State of Minas Gerais (MG). His comprehension and domain of Brazilian rhythms, further to his technique were his major characteristic that has influenced and inspired Radamés’ orchestration work. Their mutual collaboration was the tonic of their partnership for a life, at the National Radio, the Continental Records, the Radamés Gnattali Quintet and Sextet.
-  Radamés used to say he had been grown up among the ideas and concepts of anarchism, transmitted by his father and grandfather, as well as for Family friends, such as the shoemaker Caetano dal Fiume.