International Genealogical & Archival Research

We find the records. We reconstruct the story. We prove the connection.

Archival and genealogical research across Portugal, Spain, Italy and Germany, and throughout the communities their descendants built across the Americas, from New England and California to Hawaii, Argentina, Brazil, and beyond.

Prefer to reach us directly? Email us · WhatsApp

The records survive. We know where to look.

Founded and directed by Thiago Bezerra Vianna, a historian trained at the University of Coimbra, two decades of archival fieldwork behind every case. About Mnésis →

By the numbers

Two decades of results, not promises.

800,000+
immigrant records in our own archive
1,749
cases researched
96%
success in locating the document

Figures as of July 2026. The rate reflects documentary research concluded between 2006 and 2026; success means locating the target document or equivalent proof. Every case is directed by a historian.

Why Mnésis

Two decades of fieldwork, not a database subscription.

Your family may have left the Azores, Madeira, Galicia, or an Italian comune generations ago, and never passed through Brazil at all. The record of that departure may still exist, on the other side of the ocean: parish registers, passports, consular records, passenger lists. We work from original documents in the archives where they are held, and from a proprietary collection of more than 800,000 immigrant records built over twenty years. Being at the source is not a limitation. It is the whole point.

What we do

Three ways we work with family history.

Research Services

Genealogical research, document retrieval, and citizenship documentation, grounded in original sources across Europe and the Americas. We also conduct the citizenship process itself, end to end, through our legal team.

The Archive

A proprietary archive of more than 800,000 immigrant records, two decades in the making. Consular registers of births, marriages, and deaths; passenger lists; emigration permits; parish registers, sources unavailable on major subscription genealogy platforms.

Research & Stories

What daily work with original records can reveal about names, parishes, documents, and migration, told through real family histories.

How it works

From what your family remembers to documented proof.

01

Diagnosis

You tell us what the family knows: names, stories, the documents you already have. We assess whether the research is viable before you commit to anything.

02

Research

We search our own archive and the parishes, registries, dioceses, consulates, and historical repositories where the records are held, in the Americas and in Europe.

03

Documentation

We locate and obtain the records, resolving changed names, conflicting dates, and uncertain parentage along the way.

04

Report

You receive a clear report: what was found, the evidence assembled, and the historical context of your family's path.

05

Next steps

We guide what comes next: a citizenship application, additional documentation, or a family memory project.

Where to begin

Two ways in.

You want to solve a problem

You are missing a birth certificate, a parish of origin, or the proof that ties your family to Portugal, Spain, Italy or Germany. Or you are a law firm that needs the documentary groundwork done properly. Tell us what you know, and we will tell you where the documentary trail is most likely to lead.

Start your research

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You came looking for answers

You know a surname, a half-remembered village, or a family story that “there was someone Portuguese a few generations back.” Start with the stories below. Many readers arrive curious about history and leave with the first thread of their own family story.

Read Research & Stories

Research & Stories

Routes of the Portuguese diaspora.

Different communities, different routes, different economies, but the same phenomenon: names that change, memory that fades, and documents that survive.

Fall River, America’s Portuguese City

Fall River · Massachusetts

America’s Portuguese City

Azorean families entered the mills, built churches and societies, and made an American city Portuguese.

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Before Fall River

Boston · New Bedford · Nantucket

Before Fall River

Societies, a parish and a public parade, decades before Fall River became a Portuguese city.

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From São Miguel to Fall River: Joseph M. Chaves

São Miguel → Fall River

Joseph M. Chaves

An Azorean clerk who became a society president, court interpreter and steamship agent in eleven years.

Read the article →
The Three Waves That Shaped South Africa's Portuguese Community

South Africa · Cape Town & Johannesburg

The Three Waves

Madeira, mainland Portugal, and the 1975 exodus from Angola and Mozambique built one of the world's largest, and least known, Portuguese communities outside Portugal.

Read the article →
From Madeira to the Cape

Madeira · Cape Town

From Madeira to the Cape

They came in through the back door, undocumented at the border but never at the source. The parish record was written, and it can be traced.

Read the article →
The Suitcase, the Border, and the Choice

Angola & Mozambique · South Africa

The Suitcase, the Border, and the Choice

In 1975 the Portuguese world in Africa came apart. The families who chose South Africa left records that can still be traced.

Read the article →
The Portuguese Who Became Americans

New Bedford · Massachusetts

The Portuguese Who Became Americans

How Azorean surnames crossed the Atlantic and became American names, from Pereira to Perry, and why the paper trail still leads back to Portugal.

Read the article →
Sugar and the Islands

Hawaii · The Pacific

Sugar and the Islands

Twenty thousand Madeirans and Azoreans crossed two oceans to work the sugar plantations and brought the instrument that became the ukulele.

Read the article →
Tunaville

San Diego · California

Tunaville

The Azoreans and Madeirans who came by sea, stayed at sea, and made San Diego the tuna capital of the world.

Read the article →
A handwritten 1915 letter from Alexandrina's mother, Maria Eugénia, writing from Rio de Janeiro to call her daughter to Brazil.

A real case

Alexandrina da Conceição · Porto, 1915

The research located Alexandrina's birth and baptism in Porto, and it could have stopped there, with the records a citizenship application requires. It went further, and found her 1915 passport file.

Inside the file was a letter. Her mother, Maria Eugénia, already living in Rio de Janeiro, was calling her daughter to Brazil. For more than a century, an administrative document had been keeping a story of separation, waiting, and reunion.

Behind a passenger list there can be an entire family's story.

This is the kind of discovery that turns a citizenship case into a reconstructed family history, with context, evidence, and proof. Read the full story →

What families say

Often, the ones who had almost given up.

My mother was the granddaughter of a Portuguese immigrant, and she had a single document referring to her grandfather. At first it seemed impossible to reconstruct our family's history. Then Mnésis carried out a genuine work of historical investigation. Through meticulous research and every necessary step, they located the missing records and pieced our ancestors' path back together. Today my mother holds her Portuguese birth certificate, and because of it my brother and I have already begun our own citizenship applications. More than a document, it was a profoundly revealing experience.

Diego MascarenhasLawyer and university professor · Portuguese nationality

I have been a journalist for more than thirty years. I read the whole document and was struck by its structure, the way everything is laid out to reach the final point: the proof that they were married, and that she is a Portuguese citizen. The work was magnificent. If anyone needs this, Mnésis is the first name I will give.

Maurício Ribeiro, journalistThe Alexandrina da Conceição case

A wonderful firm, deeply serious and committed. The team located important documents about our relatives with real speed, and handled the whole historical and genealogical research with professionalism. For anyone who dreams of recognizing their origin, with dual nationality in reach, I recommend them without hesitation.

Monique RamosHistorical and genealogical research · Dual nationality

Without a doubt, one of the best investments I have ever made. I discovered that I have family in Spain and came to know a part of my history I never imagined existed. If you are curious about your origins and want to uncover stories, connections, and even relatives you have not met, it is well worth it.

Valker M.★★★★★ Google review

More than 18 citizenship and immigration law firms in Brazil and abroad trust Mnésis with the documentary investigation behind their cases.

See the partnership →

Frequently asked

What families ask us.

What if the document cannot be found?

No serious researcher guarantees that a specific record will be found, and transparency is a principle at Mnésis. You receive a clear report of what was searched, where, what was found, what was not, and which hypotheses remain open. If you have already spent years and money with firms that promised and did not deliver, that honesty is the difference.

My family does not know the ancestor's town of origin. Can you still research?

Yes. That is precisely our specialty. The place of origin is the single most sought-after piece of information, and our archive of more than 800,000 immigrant records was built to answer exactly that question, alongside research in archives across the Americas and Europe.

How does the initial diagnosis work?

You tell us what your family knows: names, stories, the documents you already have, and send us whatever is available. We run a preliminary analysis and come back with an assessment of viability and a quote, before you commit to anything.

How long does the research take?

It depends on the case. When the place of origin is already known, research tends to be faster. Changed names, late registration, or an unknown origin require more steps. The estimated timeline comes with the quote, after the preliminary analysis.

Do you handle the citizenship process itself?

Yes. We conduct the citizenship process end to end through our legal team, from the documentary investigation and the organization of the file to the application before the authorities. We also act as the technical research partner for more than eighteen citizenship and immigration firms that entrust their cases to Mnésis.

Do you work with clients outside Brazil?

Yes. We work remotely, by WhatsApp and online meetings, with clients across the Americas, Europe, and beyond. The fieldwork happens where the records are: the registries, parishes, and archives of Portugal, Spain, Italy, Germany, and the other jurisdictions that hold them.

Your family's history, documented to the standard of proof.

Tell us the surname, the place, or the story that survived. We will tell you where the record is likely to be, and which archive may hold it.

Start your research

Prefer to reach us directly? Email us · WhatsApp