He was born in Buenos Aires. He was the son of José Canaverys and Agustina Denis. In 1830 he graduated as a Second Lieutenant of artillery. In 1940 Canaverys was suspected of belonging to the Unitarian Party. He was discharged from the army, and the government quickly ordered his detention. Feliciano decided to escape to Uruguay and enlist in the army of General Juan Lavalle. He traveled to Tacuarembó, but was ambushed by federales troops. After being arrested, General Manuel Oribe ordered that Feliciano be executed.