text: A certain "Mestre Jacome" who served this man is identified with a Majorcan Jew named JehudÃ  Cresques.
full_question: A certain "Mestre Jacome" who served this man is identified with a Majorcan Jew named JehudÃ  Cresques. After his failed attack on the Marinid sultanate, this man's brother Ferdinand the Holy Prince was taken prisoner and died in captivity at Fez. This member of the Illustrious Generation funded his activities through his mastery of the Order of Christ, and like his brother Edward the Philosopher, he was a son of Philippa of Lancaster. This man sent Gil Eanes on an expedition to pass Cape Bojador, and many of his feats were made possible by the development of caravels. This man convinced his father John I to conquer the Moroccan port of Ceuta. For 10 points, name this member of the House of Aviz, a Portuguese patron of exploration who helped launch the Age of Discovery.
first_sentence: A certain "Mestre Jacome" who served this man is identified with a Majorcan Jew named JehudÃ  Cresques.
raw_answer: Henry the Navigator [or Prince Henry of Aviz; or Infante Dom Henrique de Avis, Duke of Viseu