La faccia di sinistra si chiama Frank, quella di destra Louie

In this Wednesday, Sept. 28, 2011 photo, a cat with two faces, named Frank and Louie, is held by the cats owner, who identified herself only as Marty, at their home in Worcester, Mass. The animal is known as a Janus cat, named for the figure in Roman mythology with two faces on one head. The owner calls the face on the left Frank, while the face on the right is identified as Louie.
(AP Photo/Steven Senne)