Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Yahia Ben Rabbi, also known as Yahya Ha-Nasi, Yahya Ibn Yaish, Dom Yahia "o Negro" or Don Yahia "El Negro" (died 1222), known as Lord of Aldeia dos Negros, Portugal - English: Village of the Blacks), and said to be a direct descendent of the Exilarchs of Babylon, was the eponymous ancestor of the "Ibn Yahya" Family. He resided in Lisbon and was held in high esteem among the Jews as well as by King Afonso I of Portugal who honored him for his courage and presented him with an estate that had belonged to the Moors, wherefore he assumed the nickname "Negro". He was the son of Yaish Ibn Yahya (died 1196); grandson of Hiyya al-Daudi (died 1154), who was a prominent Rabbi, composer and poet, and served as Advisor to Portugal''s first King Afonso I; great-grandson of David, the son of Hezekiah Gaon, the son of David, the son of Zakkai, the son of Avraham, the son of Nathan, the son of David, a Rabbi, whose father was Hazub.