José "Cheo" Marcelino Diaz Marquetti (April 26, 1909 – March 29, 1967), was an important but underappreciated Cuban singer (reginero and sonero) and songwriter in the guajira-son style.
Marquetti was born in Alquízar, Cuba. He was the son of "El Lucumí" Marquetti, an Abakuá member of Los Chinos Buenos, a white, black and mulatto band whose members dressed as Chinese. He started his career in 1930 as a singer with the Sexteto Camagüey in 1930, then in the later 1930s as singer of danzons with the Cheo Belén Puig Orchestra as well as Ernesto Muñoz's Conjunto. He then joined a number of septetos, among them Septeto Cauto, led by Manuel 'Mozo' Borgella with whom he recorded in 1940 (including the song Efi Embemoro - the first Afro-Ñáñigo song to be recorded; Cheo Marquetti previously had recorded this tune in a duet setting with Bienvenido Granda in 1936, accompanied by Septeto Nacional de Ignacio Piñeiro). This was followed by stints with Septeto Hatuey, Septeto Facenda and the famous Septeto Habanero. He is also said to have been a member of Septeto Cuba, Alabama de Abelardo Barroso, Jóvenes del Cayo, Dandy del 40, La Sonora Piñón and Septeto Mora.