How to Search for Greek Catholic and Uniate Records in Poland

The Polish Genealogist Updated on

Greek Catholic (once often called “Uniate”) registers from the former Polish borderlands are detailed, but easy to look for in the wrong archive, the wrong rite or the wrong country. Where a register is today depends on where the parish was, when the event took place and what happened to the books afterwards: border changes, wartime losses and post-war resettlement all moved them.

The Greek Catholic Church in the Polish Borderlands

In genealogical terms, “Greek Catholic” in Poland most often points to the historic eastern and south-eastern borderlands (today’s Podkarpackie and Lubelskie regions, and territories that after 1945 became part of Ukraine). The rite was Byzantine, but in communion with Rome - which is why older English-language family lore often uses “Uniate”.

Three things affect the search from the start:

  • Parish geography is not the same as modern administration. A village that is in Poland today may historically have belonged to an eparchy (diocese) whose administrative centre and archival holdings are now in Ukraine, and vice versa.
  • Registers can be held in several “layers” of custody, depending on time period and local practice:
    • the parish (if it survived and retained its books);
    • a diocesan/eparchial archive (if books were centralised);
    • the Polish State Archives (where older civil registration duplicates and some parish materials ended up);
    • sometimes Roman Catholic repositories (especially where Greek Catholic parishes were dissolved, merged, or later replaced).
  • Terminology in sources varies. You may see “gr.-kat.” / “greckokatolicki”, “unicki”, “obrządek greckokatolicki”, and in Latin- or Polish-written registers a mix of ecclesiastical and civil language.

During and after the Second World War many registers were moved, some were destroyed and survivors were later re-catalogued. A book that survived may sit in an archive under a description that does not mention its parish or rite, so a catalogue search alone can miss it.

Reading Church Slavonic and Old Ukrainian scripts in records

One of the biggest bottlenecks for international researchers is not access but interpretation. Greek Catholic registers in the borderlands may be written in:

  • Church Slavonic (often in Cyrillic, with formulaic ecclesiastical language),
  • Old Ukrainian / Ruthenian-influenced forms (language shifts by place and period),
  • Polish (especially later, or in duplicate registers),
  • Latin (common in Galicia: after the Josephine reforms of the 1780s many Greek Catholic parishes kept their tabular registers in Latin well into the 19th century),
  • occasionally German (depending on time and region, especially where Austrian administration influenced record-keeping).

Two further difficulties:

  1. Script changes are as important as language changes. Many readers can manage modern Cyrillic but struggle with older letterforms and abbreviations. Names are also written phonetically and variably (for example, the same surname can appear in several spellings across a single family line).
  2. Rite-specific vocabulary matters for correct identification. Greek Catholic entries often use different terms and calendars, and they may present patronymics or house-name patterns differently from Roman Catholic registers.

Our researchers read these scripts and check that the parish and book are the right ones before following a family line that only looks similar in a Latin-script index.

The 1875 liquidation of the Uniate Church and its records

The year 1875 is a turning point - but not everywhere in Poland in the same way. The so-called liquidation of the Uniate Church refers primarily to the Russian Partition, especially the Chełm (Kholm) region, where Greek Catholic structures were forcibly absorbed into Orthodoxy. This affects research in three ways.

  • Records may continue, but under a different ecclesiastical label. A parish that was Greek Catholic may have registers that continue as Orthodox, sometimes with changes in language and administrative format.
  • Custody can shift. Registers might be refiled with Orthodox parish records, transferred to state authorities, or later re-identified in archival systems with inconsistent descriptions.
  • People and families did not necessarily “change identity” in the way the paperwork suggests. Genealogically, you may be following the same community through a change in institutional control.

A common trap is assuming that “Greek Catholic” registers simply stop in 1875. Often they continue under another label. To follow them you need the exact locality and the partition it belonged to at the time.

Searching archives in Przemyśl vs. modern-day Ukraine

For south-eastern Poland, Przemyśl is a frequent reference point because it has been a major centre for Greek Catholic administration and for modern archival holdings. However, the correct repository depends on historical jurisdiction and later border changes.

The registers may be in any of these:

  • Polish State Archives (Archiwa Państwowe): may hold civil registration duplicates and certain church materials; catalogues can be partial, and descriptions may not flag “Greek Catholic” clearly.
  • Diocesan/eparchial archives in Poland (where active structures exist and where materials were retained or later returned).
  • Ukrainian archives (state and church-related), especially for parishes that are now over the border, or for collections relocated after 1945.
  • Local parish custody (rarely straightforward for older books, but not impossible for 20th-century material).

Searching in Poland and searching in Ukraine differ in language and also in:

  • access procedures and expectations (including whether searches are performed by staff or permitted in reading rooms),
  • catalogue maturity (some collections are well described; others require on-site knowledge),
  • how wartime and post-war transfers were handled in a given region.

For a village near the present border, expect to search on both sides, even if the family always said they came from Poland. The records followed the border.

Tracking families displaced during “Operation Vistula”

Operation Vistula (Akcja “Wisła”) in 1947 forcibly resettled large numbers of people (many from Greek Catholic communities, including Lemko and other groups) from south-eastern Poland to the so-called Recovered Territories in the west and north. For family historians, this can look like a sudden disappearance from the home parish.

In the records this shows up as follows:

  • Post-1947 life events (marriages, births, deaths) may be registered far from the ancestral village, under new civil jurisdictions and sometimes in different parishes.
  • Church affiliation may shift on paper (Greek Catholic pastoral care was heavily restricted for years; in some places Roman Catholic parishes recorded events for Greek Catholic families, or families adapted to what was locally available).
  • Paper trails can include administrative documentation, not only parish registers: resettlement lists, local authority files, and post-war identity documents may point back to the original place of origin.

You should also expect privacy and access constraints for post-war records. In Poland, civil registration (USC) access is regulated, and more recent records are typically not freely available to unrelated researchers. Before requesting anything you need to know which office holds the register now, whether it has passed to a state archive, and what proof of entitlement the office will accept.

Identifying Uniate vs. Roman Catholic entries in the same area

In many mixed-confession localities, Greek Catholic and Roman Catholic communities lived side by side, and the records can be confusing even in the correct parish. Look out for:

  • Same surnames across rites in the same village (not necessarily the same family line).
  • Inter-rite marriages and how they were recorded (the marriage might be in one parish, with annotations or expectations in the other).
  • Duplicated or overlapping coverage where a Greek Catholic parish was temporarily inactive, replaced, or where civil registration rules required duplicates in a different format.
  • Indexing bias in online databases: many platforms are stronger for Roman Catholic Latin-script materials, which can cause Greek Catholic lines to be under-represented or mislabelled.

Treat the religion named in family stories as a clue. Start with the village, find which parishes of either rite served it at the time, and only then choose the archive.

When we search for a borderland record, we check each possibility in turn: the Greek Catholic parish, the Roman Catholic parish and, in the Chełm region after 1875, the Orthodox continuation. That way a single wrong assumption does not decide the result.