In this Spanish name, the first or paternal surname is Cañas and the second or maternal family name is Pérez.
Juan José Cañas Pérez (9 June 1826 – 19 January 1918) is known for possibly having written the Himno Nacional De El Salvador (national hymn of El Salvador) along with Italian-born composer Juan Aberle.
Later in life, Cañas served as El Salvador's diplomatic ambassador to Chile. His poetry can be found at the Central American Poetic Gallery in the Salvadoran Garland.