Ottavio Di Camilo already informed us in 2001 that the letter in La Celestina contained rare words. An analysis of this text and of the foreword to La Celestina gave us not only the name of Juan del Encina, but also that of Gonzalo Fernández de Oviedo as the author. Consequently, with this study I hope to have cleared up: 1. that the authentic name of Lucena is Gonzalo Fernández de Oviedo, one of the illegitimate sons of Juan Ramírez de Lucena, 2. that Fernández de Oviedo wrote Repetición de amores and Arte de Ajedrez, 3. that Fernández de Oviedo is the author of the foreword and the first act of La Celestina and was involved in other acts and the letter too, 4. that Fernández de Oviedo is the author of the ancient text of the draughts book Marro de Punta published by Juan de Timoneda in 1547, 5. that Fernández de Oviedo constantly used pseudonyms for most of his published books, most of which I try to reflect in the second volume.