Crypto-Judaism is the secret adherence to Judaism while publicly professing to be of another faith; practitioners are referred to as "crypto-Jews" (origin from Greek kryptos - κρυπτός, 'hidden'). The term crypto-Jew is also used to describe descendants who maintain some Jewish traditions of their ancestors, often secretly, while publicly adhering to other faiths, most commonly Catholicism. The phenomenon is especially associated with early modern Spain, following the expulsion of the Jews in 1492.

Read more about Crypto-Judaism:  Europe, Asia, North America, Central, South America and Caribbean, Famous Crypto-Jews