Gaudencio Thiago de Mello (Barreirinha, state of Amazonas, 1933 - New York, 2013) was a NY-based Brazilian composer, arranger, conductor, band leader (founder of the Amazon big band which performed all Sunday nights at Sweet Basil-NY) and multi-instrumentalist (piano, acoustic guitar, percussion). He was brother of poet Amadeu Thiago de Mello.