Ángel Gregorio Villoldo Spartiti Musicali
- Nato: 16th Febbraio 1861
- Morto: 14th Ottobre 1919
- Luogo di nascita: Barracas, Buenos Aires, Argentina
Ángel Gregorio Villoldo Arroyo was an Argentine musician and one of the pioneers of tango. He was born south of the city of Buenos Aires. He was lyricist, composer and one of the major singers of the era. He is also known by the pseudonyms A. Gregorio, Fray Pimiento, Gregorio Giménez, Angel Arroyo and Mario Reguero.