10 surnames historically linked to converts from Spain in 1492 according to genealogical studies.

For centuries, millions of people in Spain grew up believing that their lineage was clear, known, and seamless. However, the historical records tell another story: surnames that today seem common, Christian or even deeply Catholic, hide a past of persecution, forced conversion and silent survival.

In 1492, with the expulsion of the Jews from Spain, one of the greatest identity transformations in European history began. Many fled. Others converted. And many more changed their surnames to survive.

Today, more than 3.4 million Spaniards could be descendants of those converts without knowing it.

This is not speculation. There are documents from the Spanish Inquisition, court archives, genealogies, and now DNA tests that confirm these lineages.

1. Perez

One of the most common surnames in Spain. What few know is that it comes from the biblical name “Peretz”, belonging to the tribe of Judah.
Dozens of Pérez families are registered as Judaizers in Toledo in the fifteenth century. Today, modern genetic testing has shown that many present-day carriers retain a high Sephardic load, despite generations of silence.

2. De la Cruz / Santa Cruz

Paradoxically, the most “Christian” surnames were the most used by converts to avoid suspicion.
The archives show that “De la Cruz” was one of the surnames most closely monitored by the Inquisition, precisely because of its excess of religious symbolism. Behind the cross, there was often Jewish blood trying to go unnoticed.

3. Garcia

This surname is a historical trap.
Not all the Garcias have the same origin.

• García del Norte: ancient Christian lineages.
• García del Sur: In many cases, converts who adopted local surnames to hide their origin.

The same word, two completely different stories.

4. Lopez

Behind this surname lies one of the hardest stories.
Many Lopez descended from Levitical families, forced to convert after bloody pogroms.
For centuries, Jewish rituals were kept unknown as “family customs” until the Inquisition detected them.

5. Martinez

This surname was not born by choice, but as punishment.
After the torture, many families were forced to abandon their original name and adopt a new one, imposed by the court.
Martínez is, for many lineages, an inherited scar, not an original identity.

6. Rodríguez

Aunque suene a apellido noble y guerrero, numerosos Rodríguez descienden de rabinos convertidos tras la violencia de 1391.
Durante generaciones, libros hebreos fueron escondidos en muros, sótanos y dobles paredes. Algunos sobrevivieron más de un siglo ocultos… hasta que alguien los descubrió.

7. Fernández

Este es el caso más irónico de todos.
Fernández significa “hijo de Fernando”… el mismo rey que firmó la expulsión de los judíos.
Muchos conversos adoptaron este apellido como acto de burla silenciosa, una forma de decir: “No nos borraste. Llevamos tu nombre y seguimos aquí”.
Una venganza que dura más de 500 años.

8. Gomez

A surname of Portuguese origin adopted by Jews who fled Spain… and then they were also expelled from Portugal.
They returned to the Spanish border with new names so as not to be detected.
Many of today’s Gomezes are descendants of those who survived two consecutive expulsions.

9. Sanchez

“Saint” surnames were a frequent strategy.
But the Inquisition knew it.
In Zaragoza, dozens of Sánchez families were prosecuted for Judaizing, precisely because the surname raised suspicions.

10. Ramirez

It was widespread in Aragon, a region with important Jewish communities before 1492.
Many Ramirez adopted the surname to look like ancient Christian lineages.
Today, DNA has revealed what the documents tried to erase.

How to know if your last name has a converso origin

1. Historical databases

There are public registries with surnames linked to inquisitorial processes and Sephardic lineages.

2. Official Archives

The National Historical Archive preserves thousands of digitized documents from the Inquisition. Many can be consulted online.

3. DNA Testing

DNA confirms what the papers keep quiet.
In many cases, between 70 and 80% of the surnames documented as converts coincide with significant Sephardic DNA.

Tips and recommendations

• Research without fear, but with respect: archives speak, but they require context.
• Talk to your family with empathy; Not everyone is ready to hear certain truths.
• Don’t take DNA as a label, but as a tool of knowledge.
• Remember: identity is not imposed, it is understood.
• Honoring your ancestors doesn’t mean changing who you are, but understanding where you come from.

A surname is not always a name.
Sometimes it’s a mask, sometimes a wound, and sometimes a silent victory.

For more than five centuries, entire families learned to be silent, to dissimulate, to survive. They changed their name, religion, visible customs… but the memory remained alive in the blood.