Marcos Coelho Neto (1763–1823) was a Brazilian composer.
Born in mining colony of Ouro Preto in 1763, his father was a former slave who became a trumpet player and composer.
[2] The younger Coelho Neto followed his father as a composer and instrumental performer.
In 1785 he was placed in charge of the productions of three operas and two dramas celebrating the marriage of João VI and Carlota Joaquina.
[2] Coelho Neto is best known today as the composer of the hymn Maria mater gratiae.