Juan López Fernández (born 13 March 1939), better known by his pen name Jan, is a Spanish comic book writer and artist, most famous for his creation Superlópez.

Completely deaf from the age of six, his parents encouraged him to draw and in 1956, he began to work in a studio in order to learn animation.

It was a series that began as a single page and later expanded into full albums, with adventures involving supervillains and criminal organizations.

It also dealt with issues affecting contemporary Spain, namely the illegal drug trade, the transition to democracy post General Franco, etc..

The stories had originally been written by Efepé (pseudonym of Francisco Pérez Navarro), but Jan later took over this duty as well.