Jesús Rosas Marcano (5 January 1930 - 7 May 2001), was a Venezuelan educator, journalist, poet and composer of folk songs popularized by the group Un Solo Pueblo, such as "Botaste la bola" and "Negro como yo".

Worked as reporter for the newspaper Últimas Noticias, directed by Oscar Yánes, starting to write humorous verses under the pseudonym of Ross Mar.

For twenty years, Rosas had the columns Capilla Ardiente and Espuma de los Días, both in daily El Nacional.

In 1999, was invited to collaborate in "Así es la Noticia", where returned with Capilla Ardiente.

In his labor as school teacher, worked in publications for children like: "Tricolor", "La ventana mágica" and "Onza, tigre y león".