Gonzalo Asencio Hernández (5 April 1919 – 1991), known as Tío Tom (Uncle Tom), was an Afro-Cuban musician who specialized in the rumba and its variant, the guaguancó.
Asencio was the author of hundreds of pieces that for decades were sung and danced by Cubans without knowing who created them, except among circles of rumba musicians.
Among his most famous compositions are "Changó ta veni", "Mata siguaraya" and "Mal de yerba".
Asencio's uncertain and bohemian lifestyle was exploited by certain “professional” musicians who registered his compositions as their own, stripping him of his author’s rights.
Only in 1982 did musicians, writers, and disc jockeys manage to organize a tribute to him, in Havana’s Plaza of the Revolution Cultural Center.