Andy says...

Created for Ernest Hemingway at La Floridita, Havana.

Created for Ernest Hemingway at the La Floritida bar in Havana, Cuba by Constante Ribalaigua when Hemingway requested their signature Daiquiri be made without sugar and with double the rum.  Some years later Antonio Meilan added the Maraschino and grapefruit juice to give us this version of the drink.  This cocktail is also known under the name Papa Doble, after the writer affectionate nick-name born of his preference for double the amount of rum in his drinks.  He requested no sugar as he suffered from a rare disease, haemochromotosis, that can manifest itself as diabetes.