=Isaac ben Abraham Troki= (1533-1596), Karaite writer, antagonizes Christianity, =4=, 648-9. =Isaac ben Asher Halevi= (Riba), of Speyer, Tossafist, =3=, 345. =Isaac ben Baruch Albalia= (1035-1094), descent of, =3=, 282. at Cordova and Granada, =3=, 283. works of, =3=, 283. escapes the massacre of Granada, =3=, 283. as astronomer, =3=, 283. chief of the Jews of Seville, =3=, 283-4. hostility of, to Alfassi, =3=, 313. descendant of, =3=, 364. =Isaac ben Eliakim=, rabbi of Würzburg, martyr, =3=, 354. =Isaac ben Jacob Alfassi= (Alkalaï, 1013-1103), Talmudist, disciple of Nissim and Chananel, =3=, 282, 285. originality of, =3=, 285-6. death of, =3=, 309. elegies on, =3=, 310, 323. makes Lucena famous, =3=, 311. hostility of, to Isaac Ibn-Albalia, =3=, 313. disciples of, distinguished, =3=, 314. successor of, =3=, 315. college of, attended by Jehuda Halevi, =3=, 322. commentaries of, annotated by Serachya Halevi Gerundi, =3=, 389. commentary on the Talmudic work of, by Jonathan of Lünel, =3=, 397. method of, followed by Nachmani, =3=, 532. Talmudic decisions by, justified by Nachmani, =3=, 532. =Isaac ben Jacob Campanton= (1360-1463), Talmudist, =4=, 230. =Isaac ben Jacob Halaban=, Tossafist, =3=, 421. =Isaac ben Jehuda Ibn-Giat= (1030-1089), poet, philosopher, Talmudist, =3=, 282, 284. disciple of, =3=, 314. =Isaac ben Joseph of Corbeil=, author of a religious manual, =3=, 587. =Isaac ben Joseph Caro=, escapes from Portugal, =4=, 378. =Isaac ben Joseph Israeli II=, astronomer, =4=, 51. =Isaac (I) ben Judah Abrabanel= (1437-1509), descent of, =4=, 169, 337. friend of Yechiel of Pisa, =4=, 286-7. collects a ransom for Jewish prisoners, =4=, 287, 339. minister of finance to Ferdinand and Isabella, =4=, 336-7, 343. character and ability of, =4=, 337. financier for Alfonso V of Portugal, =4=, 337-8. noble and learned friends of, =4=, 338, 341. instructs the Italian Jews how to receive the Portuguese embassy, =4=, 340. family of, =4=, 340, 360, 383-4, 408-10. flees to Toledo, =4=, 341. as commentator, =4=, 342-3. orthodoxy of, =4=, 342. protects the Castilian Jews, =4=, 343-4. tries to have the edict of banishment revoked, =4=, 348. goes to Naples, =4=, 359. commentary by, on the Books of Kings, =4=, 359. employed by kings of Naples, =4=, 359, 360. in Sicily, =4=, 383-4. in Venice, =4=, 385. consulted by the Venetian senate, =4=, 385-6. old age of, =4=, 386. censures the impure language of the German Jews, =4=, 388-9. death of, =4=, 409. condemns free thinkers, =4=, 479. and Messianic expectations, =4=, 482. =Isaac ben Leon=, a Granada Jew, supports Balkin, =3=, 258. =Isaac ben Meïr= of Rameru, grandson of Rashi, Tossafist, =3=, 345, 375.