No, not "The Rock", though the infamous island was discovered by Spanish explorer Juan Miguel de Ayala, who originally named it La Isla de los Alcatraces (The Island of the Gannets) for the many Gannets (seabirds) that inhabited it's rocky shores. In this case the name is in reference to the Alcatraz Flower (Calla Lily). These flowers are often popular themes in Mexican art and most notably in works by world renowned painter, Diego Rivera.
The back of the bottle has an embossed Calla Lily or Alcatraz that is seen through the front. The back label also relates a legend of "The Hacienda of the Alcatraz" which describes divine events involving ten thousand Calla Lilies and a six hundred pound agave.