How to Research Prussian Genealogy

By James M. Beidler Premium
Prussian state flag re-creation, as imagined by Wikimedia Commons user David Liuzzo

Many things are said to be a “state of mind.” For genealogists seeking 19th- and early 20th-century ancestry in what was then the largest German Empire state of Prussia, “Prussian” is a kind of a state of mind. The term’s meaning differed greatly during the half-millennium in which the Hohenzollern family wielded power in Central Europe, many of its members crowned “Kings of Prussia.”

For researchers with German ancestry, the word “Prussia” can be a stumper—and the fact that there’s no such political unit with that name in present-day Europe is just the conundrum’s starting point. German immigrants may have been grouped together as the overly broad term “Prussians.” The misleading label may belie their actual identities: Pomeranians, Rhinelanders, Hanoverians and more.

However, an “attitude adjustment” will help you solve your Prussia problems. This guide goes through the kingdom’s complicated history and shifting boundaries, plus the best Prussian genealogy records that may help you pinpoint your ancestors’ origins. I’ll walk you through three steps to tracing your Prussian ancestors.

You have “Prussian” ancestry, but can’t find “Prussia” on modern maps. Dive into this disappearing state with this brief Prussian history.

Prussian History 101

Throughout history, “Prussia” could refer to several states of varying sizes and levels of autonomy. Let’s take a quick walk through the state’s history to better understand what Prussia was and what lands may have been considered part of it.

The name “Prussia” itself originated in the Middle Ages when pagan tribes inhabited the area adjoining the Baltic Sea between Pomerania and Lithuania. These tribes were conquered by the Roman Catholic Order of the Teutonic Knights in the 1200s, who organized the territory into a fiefdom of Poland.

The region was ruled by a succession of the Knights’ grand masters for the next few centuries. But when Albert I of the Hohenzollern family became the Knights’ grand master, he converted to Lutheranism. He recast the Teutonic States as the secular Duchy of Prussia in 1525, becoming the first major Continental ruler to break from the Catholic Church’s authority during the Reformation.

Prussia became the crown jewel of the Hohenzollern family. The Hohenzollerns first held a tiny territory in southern Germany, but gained substantial land in the east in 1415 when it acquired Brandenburg (including the city of Berlin), notable for being part of the Holy Roman Empire’s electoral college. The addition of Prussia in the 1520s greatly expanded the family’s eastern holdings, and the whole Hohenzollern state became known as “Brandenburg-Prussia” in the 17th century.

The Hohenzollern’s acquisition of Prussia coincided with the later stages of German speakers moving into the area—the so-called Ostsiedlung. This strengthened bonds across the disparate German states, with the mighty Prussia significantly bolstering its strength and influence by the 17th century.

Prussia was declared its own kingdom—outside the boundaries of the Holy Roman Empire—in 1701. Out of deference to the Holy Roman Emperor (who the Prussian king nominally held allegiance to), Prussia’s monarch secured the title “King in Prussia.” The odd coinage stemmed from the tradition of the Holy Roman Empire not allowing for the rank of king among the empire’s constituent states. As a result, the Hohenzollern ruler was styled “Elector of Brandenburg” inside the empire and “King in Prussia” outside of it.

During the whole of the 1700s, the Hohenzollerns embarked on a mission to unite its scattered territories into one contiguous land mass. Along the way, the long-reigning Frederick the Great (1740–1786) conquered Silesia from the Austrians in the 1740s.

Then, Prussia—along with the Austrian and Russian Empires) dismantled the Polish-Lithuanian Commonwealth, a state large in land area but weak in military. The final result connected the family’s Prussian holdings with the rest of its territory—and wiped Poland off the map of Europe for more than 100 years.

Here are some tips for finding towns in Germany and Poland that used to be part of the Prussian Empire.

As a consequence of this increase in power, the King “in” Prussia designation grew into the King of Prussia in 1772. At that point “Prussia” (Preussen in the German language) and “Prussians” came to be the shorthand for all Hohenzollern possessions—much to the chagrin of many the kingdom’s later conquests.

Like most of Europe, Prussia was rocked by French Emperor Napoleon I has he stormed across the continent in the early 1800s, capturing some territories Prussia had gained during the partitions of Poland. Prussia cemented its status as a major European power, however, when the Congress of Vienna in 1815 returned the lands Napoleon had captured.

The Congress of Vienna also rewarded Prussia with western German territories from the recently dissolved Holy Roman Empire, such as the Rhineland and Westphalia. And it also formed Prussia and several disparate states into the German Confederation, a “kind of, sort of” continuation of the Holy Roman Empire.

Soon afterward, Prussian King Frederick William III decreed a union of the kingdom’s major Protestant denominations, the Lutherans and the Reformed (Calvinists), into Evangelische, the name under which the vast majority of today’s Protestants in Germany will be found.

Before then, most Prussian commoners were Lutherans, but the Hohenzollerns and much of the nobility had been Calvinist since the early 1600s. (Some congregations dissented from the union and became known as the “Old Lutherans,” even emigrating to the United States to avoid persecution.)

During the 1800s, Prussia dominated the smaller and weaker constituent states of the Empire, continuing its drive toward a contiguous territory with several stages and drawing it into conflict with Austria (the other prominent German-speaking power). First, there was the “soft” solution of forming a customs union (Zollverein) with other German states that excluded Austria. Then Prussia outright annexed Hanover and parts of Hesse after the two states sided with Austria in an 1866 war.

Track your Deutsche ancestors before the first unified German Empire with this map of the German city-states and kingdoms in 1865.

Prussia also led the charge against the French in the Franco-Prussian War, resulting in the 1871 declaration of the Second German Empire. The King of Prussia assumed the additional title of Emperor of Germany, and Prussia became the pre-eminent state in a federal German empire.

Along its way to the top of the German heap, Prussia became a synonymous with militarism. The German Empire was dissolved after its defeat in World War I, but Prussia remained a state of the interwar Weimar Republic. It wasn’t until after World War II that “Prussia” was erased from the map of Europe.

But all that history—including the 20th-century decline of “Prussia” as a nation-state—doesn’t change how natives of the land were referred to in the many documents referencing Prussia from the 1800s and early 1900s. (Aside, of course, from giving researchers some mental anguish!)

Step 1: Find a Prussian Town of Origin Using US Records

In many cases, the first reference to Prussian ancestry that you see will be from an American record. You might even be happy to see that detail rather than the even more generic “Germany”—until you look at the map and realize how big Prussia had become in the 19th century.

Two related pieces of information can come to your rescue. Some US records may yield the gold standard of immigrant genealogy research: an exact village of origin. Or, at least, a record might identify a Provinz (province; plural is Provinzen) to narrow down the search to a particular area of Prussia.

Check these six sources for the name of your German immigrant ancestor’s home village.

Here are some of the US records most likely to reveal your Prussian ancestor’s town of origin.

Church and Vital Records

While every record of an immigrant, spouse and children has some potential for a specific village name, church records are far and away the most likely to include such information. You can find large collections of ethnic German-American congregational registers on the free FamilySearch as well as major subscription sites and MyHeritage. (US civil vital records, too, might have specific place names, but this is less likely.)

A team led by German genealogy scholar Roger P. Minert continues to compile the valuable book series German Immigrants in American Church Records (Family Roots Publishing). Minert has published more than 20 volumes to date, each with an abstract showing origins written in the more commonly used church registers (baptisms, marriages and burials) but also harder-to-find record groups such as membership lists. In addition to the individual volumes, which you can find in libraries that have substantial German genealogy collections, Minert has created a set of consolidated indexes to the first 14 volumes, which you can find in libraries with large German collections.

In addition to church records, tombstones (often more detailed in earlier eras than they are today) will sometimes have villages of origin carved on them. Find a Grave has become the leading site showing memorial information, but there are still many offline sources such as marker transcripts in county historical and genealogical libraries.

Federal Censuses

Fortunately, many US censuses inquired about the respondent’s place of birth, making them a possible source for your ancestor’s Prussian origins. Questions varied by census year—and didn’t guarantee that the enumerator would follow the proper instructions—but may still provide some insight:

  • 1850: Enumerators were to use “the name of the government or country if without the United States.” Many used “Germany,” even though that was not yet technically a country. But you might still see references to Prussia or smaller contemporary German states such as Hesse.
  • 1860 through 1880: Instructions said that “Germany” was too general of a response, and requested that the enumerator gather what state within the region if possible. (From the 1860 instructions: “To insert simply Germany would not be deemed a sufficiently specific localization…the particular German State should be given—as Baden, Bavaria, Hanover.”)
  • 1900: The instructions reverted back to less-specific country/region, encouraging Germany over Prussia or Saxony.
  • 1910: Germany wasn’t mentioned, but the instructions seemed to encourage more specificity. For example, the enumerator was to distinguish between the different parts of partitioned Poland (i.e., “German Poland” instead of just “Poland”) or the two main constituent countries of Austria-Hungary.
  • 1920 through 1940: Enumerators were asked to distinguish between (in 1920) the provinces of dissolved empires like Germany. Similarly, in 1930 and 1940, enumerators were to ask what country the person’s birthplace was in as of 1930 and January 1, 1937 (respectively), taking into account recent border changes.

Immigration and Naturalization Records

US passenger arrival lists often give birthplace (or place of last residence) data. But for the many Prussians who left via the port of Hamburg, embarkation lists show even more detailed information. These embarkation lists (as well as handwritten indexes for them that might be needed as a workaround for bad handwriting) are available on

Naturalization documents are especially important if your ancestor became a citizen (which you can determine by examining federal censuses). For most, naturalization was a two-step process that required a declaration of intent followed by a petition for naturalization. Both contain valuable information about origins; make sure you look for both document types. (Note: Naturalization documents contain uniform information after the process was federalized in 1907, but details will vary in earlier records.)

You can also find geographic-specific databases of emigrants relating to Prussian areas. For example, the Schleswig-Holstein Rootdigger group has more than 100,000 emigrants documented, while the website Ahnenforschung im Internet—Raum Rheine has hundreds of emigrant names from the Rhineland.


Once you have some more direction about your ancestor’s province, consult resources created by individual societies and genealogy groups about “Prussians” who came from a particular region. To give just two examples:

  • The Ostfriesen Genealogical Society of America has an emigrant database listing some 30,000 people from Ostfriesland (East Frisia/Friesland), part of the Kingdom of Hanover that was annexed by Prussia in 1866.
  • Pommerscher Verein groups were formed by descendants of emigrants from the Prussian province of Pomerania. One such group, Pommerscher Verein Central Wisconsin, has a library of difficult-to-find church records.

Step 2: Map Your Ancestral Town

Even once you have a town name, you might not be able to simply type it into Google and locate it on a modern map of Germany. Perhaps the name is misspelled in a record or has multiple names. Or maybe there are too many villages with the same name to pin down your ancestor’s—like how there’s a “Springfield” in nearly every US state.

When you face one of these problems, your first stop should be the Meyers Gazetteer, the leading geographical dictionary of German lands published in the Second Empire period and available online. The online version of “MeyersGaz” includes the original gazetteer’s detailed information on each town, then supplements it with interactive modern-day and historical map overlays.

Specifically for Prussian areas that are now in Poland, Kartenmeister gives loads of information about the villages east of the Oder and Niesse rivers (the current boundary between Germany and Poland). The profile for each town name includes both German- and Polish-language place names, as well as what districts and parishes the villages belonged to.

The Kartenmeister website helps you locate more than 71,000 places in what was once eastern Prussia. Follow our example to get started!

Another valuable tool can be the “Prussia, Municipality Gazetteer, 1905” (Gemeindelexikon für Königreich Preussen) on This gazetteer can be helpful in determining which Catholic and Protestant parishes a village belonged to—information not found in the Meyers Gazetteer. (Kevan Hansen’s Map Guide to German Parish Registers series, found in many libraries that have German collections, can also give this information.)

You also won’t want to miss the Germany-based supersite CompGen, which hosts research-aid primers for all of the former Prussian provinces, a historic gazetteer (GOV), and links to many regional groups. Though its home page is in German, the site has an English-language interface called

Step 3: Find Prussian Genealogy Records

Once you’ve found your ancestral town of origin and located it on a map, you can consult a few different resources for Prussian records.

The Family History Library has large volumes of microfilm containing births, marriages and deaths from historical Prussia. Many of these have been digitized and indexed; look at FamilySearch’s list of collections to see what’s available for “Prussia” or the modern German/Polish state your ancestor’s town of origin is in.

Some of these collections are also on and MyHeritage, since the two companies helped fund some of FamilySearch’s digitization projects.

Church archives themselves are digitizing records from their congregations. and Matricula have growing browsable databases of Protestant and Catholic records, respectively.

Prussian civil registration dates to 1874 in most places, and (for the most part) are kept in the civil registry office (Standesamt) where the event occurred. Some local groups are transcribing them, but you’ll need to write to the office to get records from most places.

“Standesamt I” in Berlin holds duplicate copies of civil registries in eastern Prussian territories now in Poland or Russia. has a collection of these records: “Eastern Prussian Provinces, Germany [Poland], Selected Civil Vitals, 1874–1945.”

Other record groups haven’t survived the region’s tumultuous 20th century. Most military records, for example, were unfortunately destroyed in WWII bombing (though documents from independent Hanover have survived). Likewise, early German censuses were thrown away, though some remain in local government archives.

Prussian genealogy research isn’t always easy. But with the right attitude, dedication, and tools, you can find your ancestors who lived within the limits of the former kingdom.

A version of this article appeared in the January/February 2021 issue of Family Tree Magazine.

Trace your ancestry in Prussia, Bavaria and more with our guide to research in Germany’s historical regions
Dive into millions of church records, immigration documents, gazetteers, maps and more with these top German genealogy websites.
Herzlich willkommen! From language guides to websites, everything you need for your German genealogy journey. Plus, research tips on finding Austrian, Prussian and other German-speaking ancestors.

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