1,289 people were registered with the surname BAJ (male) in the PESEL register on 20 January 2026.
Surname BAJ
People with the surname BAJ in the PESEL register on 20 January 2026: 1,289 men and 1,265 women. Most registered in: PODKARPACKIE.
6 verified statements
male
1,289people in the PESEL register · 20 January 2026
about 1 in 16,445
Most registered in: PODKARPACKIE (30.8%, 20 January 2026)
female
1,265people in the PESEL register · 20 January 2026
about 1 in 17,044
Most registered in: PODKARPACKIE (28.0%, 20 January 2026)
Each 1-in-X is computed within its own dataset. The datasets are different sizes, so these two figures are not compared with each other.
01
How many people have this surname?
The PESEL register publishes two separate surname lists, male and female. We show each figure on its own and never add them up.
male
female
1,265 people were registered with the surname BAJ (female) in the PESEL register on 20 January 2026.
The male and female datasets are separate and are never summed.
02
How rare is this surname?
“1 in X” means that roughly one in every X people on this list has this surname. The bigger X, the rarer the name. The rank counts from the most common surname on the list.
male
about 1 in 16,445
1001k10k100k1M10M
← more commonrarer →
#2,269 rank on the surname list
About 1 in 16,445 people counted in the PESEL register (male) bore the surname BAJ on 20 January 2026.
BAJ (male) ranked 2,269 among the surnames in this dataset.
- #2,267SŁOMA1,292
- #2,268WOCH1,290
- #2,269BAJ this surname1,289
- #2,273KONDRATIUK1,288
- #2,273KRYSIŃSKI1,288
female
about 1 in 17,044
1001k10k100k1M10M
← more commonrarer →
#2,367 rank on the surname list
About 1 in 17,044 people counted in the PESEL register (female) bore the surname BAJ on 20 January 2026.
BAJ (female) ranked 2,367 among the surnames in this dataset.
- #2,365ANTONOWICZ1,266
- #2,365KONEFAŁ1,266
- #2,367BAJ this surname1,265
- #2,372FIEDOROWICZ1,264
- #2,372KŁYS1,264
Two places above and two below on the same list. Surnames with the same count share a place.
03
Where is it most often registered?
The map and the list show the voivodeships where people with this surname have a registered permanent address. The brighter the colour and the longer the bar, the bigger the share.
male
Among the 1,170 people with the surname BAJ (male) who had a registered voivodeship on 20 January 2026, 30.8% were registered in PODKARPACKIE.
Hover over or tap a voivodeship to see its figures.
Share of people with a registered voivodeship, lowest first:
- 0%–10%
- 10%–20%
- 20%–30%
- 30%–40%
- 40%–50%
- not listed in the dataset — not zero
| Voivodeship | Share | Count |
|---|---|---|
| PODKARPACKIE | 30.8% | 360 |
| LUBELSKIE | 25.6% | 300 |
| MAZOWIECKIE | 10.5% | 123 |
| ŚLĄSKIE | 6.3% | 74 |
| DOLNOŚLĄSKIE | 5.9% | 69 |
| MAŁOPOLSKIE | 4.1% | 48 |
| POMORSKIE | 4.1% | 48 |
| OPOLSKIE | 3.2% | 38 |
| LUBUSKIE | 2.1% | 24 |
| ZACHODNIOPOMORSKIE | 2.0% | 23 |
| ŁÓDZKIE | 1.7% | 20 |
| KUJAWSKO-POMORSKIE | 1.5% | 17 |
| PODLASKIE | 0.8% | 9 |
| WARMIŃSKO-MAZURSKIE | 0.5% | 6 |
| WIELKOPOLSKIE | 0.5% | 6 |
| ŚWIĘTOKRZYSKIE | 0.4% | 5 |
female
Among the 1,180 people with the surname BAJ (female) who had a registered voivodeship on 20 January 2026, 28.0% were registered in PODKARPACKIE.
Hover over or tap a voivodeship to see its figures.
Share of people with a registered voivodeship, lowest first:
- 0%–10%
- 10%–20%
- 20%–30%
- 30%–40%
- 40%–50%
- not listed in the dataset — not zero
| Voivodeship | Share | Count |
|---|---|---|
| PODKARPACKIE | 28.0% | 330 |
| LUBELSKIE | 25.8% | 304 |
| MAZOWIECKIE | 10.6% | 125 |
| ŚLĄSKIE | 6.9% | 82 |
| DOLNOŚLĄSKIE | 5.8% | 69 |
| POMORSKIE | 4.5% | 53 |
| MAŁOPOLSKIE | 3.6% | 42 |
| OPOLSKIE | 3.5% | 41 |
| ZACHODNIOPOMORSKIE | 3.3% | 39 |
| ŁÓDZKIE | 2.0% | 24 |
| LUBUSKIE | 1.9% | 22 |
| KUJAWSKO-POMORSKIE | 1.3% | 15 |
| PODLASKIE | 1.0% | 12 |
| WARMIŃSKO-MAZURSKIE | 0.8% | 10 |
| WIELKOPOLSKIE | 0.7% | 8 |
| ŚWIĘTOKRZYSKIE | 0.3% | 4 |
04
How did this count change between editions of the list?
The PESEL register publishes its lists every year. We show the number of people with this surname on each edition, beside how the whole list changed. We say what changed, not why.
male
The number of people with the surname BAJ (male) in the PESEL register changed from 1,303 on 30 June 2019 to 1,289 on 20 January 2026: −1.1%. The whole list changed by +6.7% between those editions.
| As of | Share of the list | People |
|---|---|---|
| 30 June 2019* | 1 in 15,242 | 1,303 |
| 22 January 2020 | 1 in 15,245 | 1,304 |
| 1 February 2021 | 1 in 15,446 | 1,294 |
| 27 January 2022 | 1 in 15,565 | 1,298 |
| 30 January 2023 | 1 in 16,019 | 1,299 |
| 19 January 2024 | 1 in 16,161 | 1,298 |
| 22 January 2025 | 1 in 16,240 | 1,299 |
| 20 January 2026 | 1 in 16,445 | 1,289 |
* The 2019 files describe their contents in fewer words than the later ones. We read them as the same list: people with their current surname.
female
The number of people with the surname BAJ (female) in the PESEL register changed from 1,268 on 30 June 2019 to 1,265 on 20 January 2026: −0.2%. The whole list changed by +6.5% between those editions.
| As of | Share of the list | People |
|---|---|---|
| 30 June 2019* | 1 in 15,969 | 1,268 |
| 22 January 2020 | 1 in 15,909 | 1,271 |
| 2 February 2021 | 1 in 16,031 | 1,264 |
| 27 January 2022 | The publisher's file dated 27 January 2022 repeats the data of the previous edition, so it is not shown as an edition of its own. | |
| 30 January 2023 | 1 in 16,747 | 1,276 |
| 19 January 2024 | 1 in 17,007 | 1,263 |
| 22 January 2025 | 1 in 16,997 | 1,267 |
| 20 January 2026 | 1 in 17,044 | 1,265 |
* The 2019 files describe their contents in fewer words than the later ones. We read them as the same list: people with their current surname.
05
What does this surname mean?
We give a meaning only when a scholarly work supports it. We don't guess.
We have no sourced meaning for this surname. We could not find it in any scholarly work we are able to cite here, and we do not guess at meanings.
06
Where does it appear in old print?
Polona, the National Library's digital library, searches its catalogue and the text of its scanned pages. We show how many results it returns for this word, and from which years.
The word BAJ appears on 126,756 pages of works not under copyright and in 288 catalogue records in Polona (searched on 4 October 2026).
These are search results for the word in any inflected form. Some may be another meaning of the same spelling, and they are not a count of people or of mentions of anyone's family.
- before 18001,907
- 1800–184922,374
- 1850–189947,912
- 1900–191813,615
- 1919–193936,361
- 1940 on4,511
Catalogue records by kind
- Ephemera72
- Periodicals64
- Books20
- Articles3
- E-books2
- Photographs2
Most common places of publication
- Warszawa25,009
- Poznań15,289
- Wrocław9,976
- Lwów8,769
- Kraków6,199
- Gdańsk5,999
Example pages in the public domain
„Baj, baj, baj, — itd.”
„hatte vormeßen, bas von bem epnigen eßen, baj 2lbam von bem appt>el ba, 5 baj webit goteê gebot waj”
„jestent Baj, taki Baj, co ma żółte bntki. Chodzę tu, chodzę tam. koto łóżka chodzę: tupii-tup!”
07
Who well known has this surname?
We have not looked this surname up in Wikidata yet.
Sources on this page
- Official data Ministerstwo Cyfryzacji — Nazwiska występujące w rejestrze PESEL · 20 January 2026 · CC0 1.0 · Dane pochodzą z rejestru PESEL, Ministerstwo Cyfryzacji, dane.gov.pl (CC0 1.0) · dane.gov.pl
- Digital library Biblioteka Narodowa — Polona · Polona, Biblioteka Narodowa · polona.pl
How to read these figures
- Wykaz nazwisk męskich osób żyjących (wg pola nazwisko aktualne) występujących w rejestrze PESEL, stan na 20.01.2026
- Surnames occurring once are not published; absence from the dataset is not zero.
- The publisher does not state whether the split is by a person's sex or by the grammatical gender of the surname form. The datasets are therefore neither summed nor compared numerically.
- The male and female datasets are separate and are never summed.
- Wykaz nazwisk żeńskich osób żyjących (wg pola nazwisko aktualne) występujących w rejestrze PESEL, stan na 20.01.2026
- Denominator: 21,197,537 people counted in the PESEL register — the sum of the published counts in this dataset, not Poland's population.
- The 1-in-X figure is rounded; the count of people is exact.
- Denominator: 21,560,302 people counted in the PESEL register — the sum of the published counts in this dataset, not Poland's population.
- A permanent registered residence is an address in the register — not an actual address, and not information about a family's roots.
- Shares are of the people with a registered voivodeship, not of every bearer of the surname.
- The size of the list itself changes between editions, so beside the count we show the share of that edition's list (“1 in X”).
- Polona's figures are search results for the word in any inflected form, in the catalogue and in the text of pages of works not under copyright; not every result is the surname.
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Counts, rarity, the map and the change on one card, each with its date and source. Share it or save it.