There is more than one artist with this name:
1) Los Hermanos is a Brazilian band from the state of Rio de Janeiro, which mixes up indie rock with mpb and samba elements. The band members are Marcelo Camelo, Rodrigo Amarante (both guitars, lyrics and vocals), Bruno Medina (keyboard) and Rodrigo Barba (drums).
Official Homepage of Los Hermanos
They recorded two demos that eventually found their way into the hands of Paulo André, the producer of the Abril Pro Rock festival, in Recife.