Potenciano Gregorio, often referred to as Potenciano Gregorio Sr. (May 19, 1880 February 12, 1939) was a Bicolano musician. He was the composer of "Sarung Banggi" (One Evening), the most famous song in the Bikol language. Potenciano Gregorio later sold the rights to the song to . He also wrote other songs like "Pusong Tagub nin Sakit" and "Hinuyop-hoyop nin Dios". In 1919, he joined the Philippine Constabulary band under the tutelage of Col. Walter Loving. In 1961, a fire hit Santo Domingo which destroyed Potenciano Gregorio's ancestral home.