Was Columbus secretly a Jew?

During Columbus' lifetime, Jews became the target of fanatical religious persecution. On March 31, 1492, King Ferdinand and Queen Isabella proclaimed that all Jews were to be expelled from Spain. The edict especially targeted the 800,000 Jews who had never converted, and gave them four months to pack up and get out.

Columbus, who was known in Spain as Cristóbal Colón and didn't speak Italian, signed his last will and testament on May 19, 1506, and made five curious -- and revealing -- provisions.

Columbus' voyage was not, as is commonly believed, funded by the deep pockets of Queen Isabella, but rather by two Jewish Conversos and another prominent Jew. Louis de Santangel and Gabriel Sanchez advanced an interest free loan of 17,000 ducats from their own pockets to help pay for the voyage, as did Don Isaac Abrabanel, rabbi and Jewish statesman.

Estelle Irizarry, a linguistics professor at Georgetown University, ...explains that 15th-century Castilian Spanish was the "Yiddish" of Spanish Jewry, known as "Ladino." At the top left-hand corner of all but one of the 13 letters written by Columbus to his son Diego contained the handwritten Hebrew letters bet-hei, meaning b'ezrat Hashem (with God's help).