Here in Lima, there is a family called Aliaga, who are the owners of the oldest house in Lima, called the Casa de Aliaga (http://www.casadealiaga.com/). The house was built right next to Francisco Pizarro's own house, which is today the palace of Government. They are descendants of Captain Jeronimo de Aliaga, who arrived in Lima with Pizarro and was present at the founding of the city in 1535.

There's actually a community in Cuba (and in Miami) that traces ancestry back through Spain all the way from Mt. Sinai.

Some of the first European settlers in Cuba were marranos, who were also called "conversos" or "Crypto-Jews" - descendants of Jewish families that, during the Inquisition(s), either outwardly converted to Christianity (while keeping their traditions alive as best as possible) or else went into exile... or both, one after the other.

In Spain, 1492 was significant not just as the year Columbus planted a flag in Hispaniola, but also the year of the Jewish Expulsion Order. Subsequent to that, many found their way to the New World.

I've heard of a tradition of handing down of keys through families... keys to the houses back in Spain from which the exiles were driven centuries ago.

More well attested is the passing down of prayers, secretly.

There are marranos in Ibiza, Portugal, the Balearic Islands, Amsterdam, Turkey and North Africa... and in Brazil and the U.S. and the Caribbean.

Not all Jews exiled from Spain were marranos (who were, technically, the Jews who pretended to convert), and not all conversos were exiled.

Historical specifics get hard to pin down, because secrecy is a big part of the group identity. But yes, some people do claim marrano ancestry, tracing back reasonable claims to early settlers following Spanish exile.