Aniceto de los Dolores Luis Gonzaga Ortega del Villar (17 April 1825 – 17 November 1875) was a Mexican physician, composer, and pianist. Although he had a distinguished career as a physician and surgeon, he is also remembered today for his 1871 opera Guatimotzin, one of the earliest Mexican operas to use a native subject. He is related to the Colonial Administrator and Archbishop of Nueva Espana, who became the Viceroy of Nueva Espana twice over. He became Conde del Peñasco by way of marriage, and was a Conde del Oploca by way of birth, amongst other titles.