Kasia
given name · Latin script
Meaning: a diminutive of the female given name Katarzyna
A female name· listed as female by the registers that count names by sex
(measured from records)Officially recorded in 30 countries · latest register: dane.gov.pl, 2026
/kaɕa/(machine-generated) pronunciation, model-generated
Kasia is a female given name written in the Latin script, with more bearers in Brazil than in any other country.
- GBUnited Kingdom≈1 in 37K(inferred from the name graph)
- USUnited States1 in 165K
- PLPoland1 in 181K
carrying the name, as counted by its national register where one exists and as Mondonomo estimates it elsewhere (marked ≈ and "est." on hover). Where a country counts another spelling of the name rather than Kasia itself, the figure is that spelling’s, and it is named. One hue, darker where it is more common; hover a country for its figure.
- Brazil (measured from records)
- 3 (measured from records)
- Record sources
- 206 (measured from records)
- ≈1 in 12K (inferred from the name graph)
64,000 named Cassia, 2022
recorded for this name
corpus datasets behind its best-documented spelling
strongest: highest-authority source
Ireland, est.
measured from records inferred from the name graph
Spellings & scripts
(measured from records)Spellings marked ● are how people bearing the name write it in our records, and ○ marks a model's transliteration; click a spelling to open its page.
Meaning & origin
(measured from records)a diminutive of the female given name Katarzyna
Cited for this meaning 1
- kaikki.org Wiktionary extract (IPA + transliterations)
Attested across 20 languages in the etymology graph.
Often considered alongside
Names that people choosing a name often weigh against Kasia, most often first. They share a style rather than an origin.
From the names suggested together in public name-advice forums, in English. A list of what people consider, not a measure of how common any name is.
Where in the world
(measured from records)Kasia counted together with the spellings and other-language forms grouped with it. Where a register counted another spelling, the row names it.
Sorted by bearers: national registers' counts, and Mondonomo's estimates (≈, est.) where no register counts.
| Country | Most common spelling | Sources | ||||
|---|---|---|---|---|---|---|
| BR Brazil | — | 64,000as Cassia | 1 in 3.3K | 68K | — | 1 |
| US United States | — | 2,016 | 1 in 165K | 2K | Kasia | 206 |
| GB United Kingdom | — | ≈1,800 est. | ≈1 in 37K | 4 | Kasia | 104 |
| IT Italy | — | ≈830 est. | ≈1 in 75K | 1 | Kasia | 14 |
| CA Canada | — | ≈620 est. | ≈1 in 60K | 5 | Kasia | 65 |
| IE Ireland | #758 | ≈420 est. | ≈1 in 12K | — | Kasia | 29 |
| NO Norway | — | ≈260 est. | ≈1 in 21K | 62 | Kasia | 10 |
| PL Poland | #131 | 211 | 1 in 181K | 211 | Kasia | 136 |
| GY Guyana | — | 38as Cassia | 1 in 20K | 38 | — | — |
64,000 people counted by IBGE — names by decade (Kaggle mirror), 2022. Exact figures are national registers' own counts, while figures marked ≈ and est. are Mondonomo’s estimates, counted from our sources and calibrated against those registers; hover one for how far to trust it in that country. A dash means neither exists.
Registers cited: IBGE — names by decade (Kaggle mirror); IBGE — Nomes (census name API); dane.gov.pl — PESEL given names (first + second name position, 2026-01-20); dane.gov.pl — PESEL living persons (names); Census Bureau — First Name Frequency 2020 by sex; NRS — Baby names Scotland full list (1974–present); Alberta Open Government — Frequency and Ranking of Baby Names by Year and Gender; ISTAT — Contanomi newborn per-name series (1999–2024, JSONP backend); SSB — Navnesøk (name-search service, living population); Guyana — Official List of Electors July 2025. Figures without a register are Mondonomo estimates; see Methodology.
Country figures for a list of names, at full precision, are available under licence rather than by scraping this table (how that works).
Other recorded senses
(measured from records)Kasia is also recorded in 2 other lexicons, as a different name or as an ordinary word. These are senses of the spelling, not of the name above.
Polish: pet form of Katarzyna (see KATHERINE ).
as a word
In Basque, "Casia, kasia landarea, kanela " Urt IV 269.
as a wordOrotariko Euskal Hiztegia (OEH) — General/Historical Basque Dictionary, Euskaltzaindia
Ordered by how much of this spelling's record each language holds, so a sense from a language the name is barely used in sits last rather than first.
Notable people with this name
(measured from records)- Katarzyna Kobrob. 1898PLnot in their usual namePolish sculptor (1898-1951)
- Katarzyna Hallb. 1957PLnot in their usual namePolish politician
- Katarzyna Figurab. 1962PLnot in their usual namePolish actress
- Kasia Nosowskab. 1971PLPolish singer
- Kasia Kowalskab. 1973PLPolish singer
- Kasia Smutniakb. 1979PLPolish actress and model (1979)
- Kasia Mośb. 1987PLPolish singer, songwriter, and dancer
- Kasia Strussb. 1987PLPolish model
- Katarzyna Kiedrzynekb. 1991PLnot in their usual namePolish association football player
- Katarzyna Niewiadomab. 1994PLnot in their usual namePolish professional cyclist (born 1994)
The ten people covered by the most Wikipedia language editions — a proxy for cross-cultural notability, which favours historical and Western figures over equally prominent contemporary ones — shown by birth year. Source: Wikidata (CC0).
How to address them
(machine-generated)A formal English salutation is built on the surname, so it needs a full name — on its own, a first name only supports the informal form.
Evidence
(measured from records)52 registers and reference works attest this spelling, across 30 countries.
| Country | Register | Year | Count | Rank |
|---|---|---|---|---|
| US United States | Census Bureau — First Name Frequency 2020 by sex | 2020 | 2K | #7,532 |
| BR Brazil | IBGE — Nomes (census name API) | — | 723 | #11,354 |
| BR Brazil | Brasil.IO genero-nomes (IBGE Censo 2010 mirror, CC-BY-SA) | — | 717 | #5,783 |
| BR Brazil | IBGE — names by decade (Kaggle mirror) | 2022 | 635 | — |
| BR Brazil | IBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname) | — | 633 | #11,337 |
| PL Poland | dane.gov.pl — PESEL living persons (names) | — | 211 | #993 |
| PL Poland | dane.gov.pl — PESEL given names (first + second name position, 2026-01-20) | 2026 | 211 | #993 |
| BR Brazil | IBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname) | 2010 | 63 | — |
| NO Norway | SSB — Navnesøk (name-search service, living population) | — | 62 | #10,482 |
| US United States | SSA — National Baby Names (1880–present) | 2025 | 23 | — |
| CA Canada | Statistics Canada — First names at birth by sex at birth (Table 17-10-0147-01) | 1999 | 21 | — |
| CA Canada | Statistics Canada — First names at birth by sex at birth (Table 17-10-0147-01) | 1998 | 21 | — |
Reference works 4
- Wikipedia given-name tokens
- Wikidata name items (native-script + romanized given/family names)
- Rymut, Słownik nazwisk współcześnie w Polsce używanych (10 vols, IJP PAN, Kraków 1992–1994) — every Polish surname in the PESEL register at the end of 1990, with bearer counts nationally and per voivodeship1990
- Ethiopian name tokens (GitHub lehagere/ethiopian-names, 40/60 condominium list)
These works list the name; their figures are licensed and are not reproduced here.
Register rows as of the 2026-10-09 data build.
Frequently asked questions
- What does the name Kasia mean, and where does it come from?
- a diminutive of the female given name Katarzyna Recorded by kaikki.org Wiktionary extract (IPA + transliterations).
- How do you pronounce Kasia?
- A machine transcription gives /kaɕa/ (IPA) for Polish.
- What are other forms of the name Kasia?
- In the etymology graph, Karen, Kathleen and Catherine are forms of the same name in other languages; it is recorded as a short form of Katarzyna.
- Is Kasia a male or female name?
- Kasia is a female name. National registers that list it by sex list it as female: United States (Census Bureau, 2020), Brazil (IBGE) and Poland (dane.gov.pl).
- In which country does Kasia have the most bearers?
- In Brazil, the national register counted about 64 thousand people named Cassia, more than in any other country we hold.
- How common is the name Kasia?
- In the United States, the national register counted 2,016 people named Kasia in 2020, about 1 in 165 thousand residents.
- How common is Kasia compared with other names?
- In Poland, Kasia is the 131st most common given name of 25,969 given names recorded there.
What do you want to know about Kasia?
Nobody replies to these one by one, but what readers ask decides what these pages answer next.
Query this name via API
curl -H "X-API-Key: YOUR_KEY" https://api.mondonomo.ai/api/v1/name-graph/kasiaThe payload this page is built from: spellings and scripts, countries and languages, related names, and the registers that attest the form. It takes a free API key (1,000 requests a day), which returns what this page shows everyone; the full country table, every register citation and the year-by-year series come with a licensed key, as does bulk access.
About this data
measured from records inferred from the name graph machine-generated
These figures come from the data snapshot of and will change as it is rebuilt.
Statistics are aggregated from the Mondonomo name corpus; related names and etymology are inferred from the name graph; pronunciation and any machine-marked transliterations are model-generated. Read how the numbers are made, including their known failure modes, and where the data comes from.
Reference works we consult — surname dictionaries, official name registers, Wikidata and Wiktionary — are named directly, beside the claims they support. The per-country source counts also include datasets of person records: we publish how many there are and their authority tier, but not their names.
Cite this page Mondonomo, “Kasia” — the 131st most common given name in Poland. Data snapshot 2026-10-13.