Since multiracial relations in Brazilian society have occurred for many generations, some people find it difficult to trace their own ethnic ancestry. Today a majority of mixed-race Brazilians do not really know their ethnic ancestry. Their unique features make them Brazilian-looking in skin color, lips and nose shape or hair texture, but they are aware only that their ancestors were probably Portuguese, African or Amerindian. Also, there was a very large number of other Europeans (counted in the millions) who contributed to the Brazilian racial make up, Japanese (the largest Japanese population outside Japan), Italian (the largest Italian population outside Italy) Lebanese (the largest population of Lebanese outside Lebanon), Germans, Poles and Russians. There is also a high percentage of Brazilians of Jewish descent, perhaps hundreds of thousands, mostly found in the northeast of the country who cannot be sure of their ancestry as they descend from the so-called "Crypto-Jews" (Jews who practiced Judaism in secret but outwardly pretended to be Catholics), also called Marranos or New Christians, often considered Portuguese. According to some sources, one third of families arrived from Portugal during colonization were of Jewish origin.