Traditional Mexican music performer Casimiro (given birth to Casimiro Zamudio), aka el Mexicano Mayor, began his effective career while taking part in a popular regional band called el Mexicano. There he performed along with Germán Román, who later on assembled his personal group, Germán Román con Su Banda República. After un Mexicano disbanded, Casimiro debuted like a single artist using the release of Un Mexicano Mayor.