Dionisio Aguado y García (8 April 1784 – 29 December 1849) was a Spanish classical guitarist and composer of the late Classical and early Romantic periods, born and mostly resident in Madrid, where he studied with Miguel García. In 1826 he traveled to Paris, where he became close friends with fellow guitarist-composer Fernando Sor — commemorated in Sor’s duo Les Deux Amis (“The Two Friends”) — before returning to Madrid in 1837, where he died in 1849.

Aguado’s Nuevo Método para Guitarra (1843) codified right-hand fingernail technique and remains in print today; he also invented the “tripodison,” a stand that isolated the guitar’s body from the damping effect of the player, and his numerous waltzes, minuets, and studies remain widely taught staples of early Romantic guitar pedagogy.

Sources:

• https://en.wikipedia.org/wiki/Dionisio_Aguado_y_Garc%C3%ADa