According with web sources Yosef of Fustat, son of Exilarch Chizkiya IV, fled to Granada (1040), an independent Sultanate in Spain. Here he found refuge with Rabbi Yosef Ha-Naggid, whose ancestors had lived in Spain for several generations. He stayed with him until he was murdered at Granada (1066). Yosef then went north into Christian Spain, then on to France and Italy, and finally returned to the Middle East, and resided at Fustat (Cairo, Egypt).
The Yosef son, Pagano Ebriaci [the Hebrew], died in Pisa (c.1091-92).
The son of Pagano, Ugo I E(m)briaci (1077-1115) was a Genoese patrician.
The son of Ugo I, Ugo II Ebriaci (1108-1136) was a Pisa patrician.
I have the relatives of Ugo II Ebriaci untill XVI century.
In Pisa still exist a middle age city district named - Chizkiya - hub of islamic and hebrew merchants.
The Arab geographer Idrisi describes Pisa (half XII century), as a communication hub in the central centuries of the Middle Ages: "Pisa, a city of Rûm, its name is famous, its territory extended, and it has thriving markets and nice houses, spacious promenades and vast countryside, it is plentiful of orchards and gardens and uninterrupted sown fields. Its position is mighty, the memories of its feats are frightening, high are its fortalices, fertile are its lands, plentiful is its water, marvellous are its monuments. The people has many horses and ships, and is (always) ready to sea raids against other countries. The city is situated on a river that comes from a mountain near ankubardah (Langobardia). This river is wide and has mills and gardens on its banks" *Italy described in the “Book of King Roger” written by Edrisi, by M. AMARI e C. SCHIAPARELLI, Rome 1883, p. 85. Cfr. S. DEL LUNGO, Bahr ‘as Shâm. Muslim Presence in Central and Northern Tyrrhenian Sea in High Middle Ages, Oxford 2000, p. 91.
Ebriaci is modified into E(m)briaci [from Embria=drunken] by their relative genoese Spinola family because they did not like to have a Sephardi Jews relative in the late 15th century.
http://www.britannica.com/EBchecked/topic/185598/Embriaci-Family
In Pisa Ebriaci family is known also "da Parlascio, [filii] Ebriaco".
The translation of "filii Ebriaco" is: the son of the Hebrew.
http://en.wikipedia.org/wiki/Ugo_da_Parlascio_Ebriaco