Leoncjusz
given name · Latin script
Recorded as a male name· opposite-gender records fall within measured source noise
Leoncjusz is a given name written in the Latin script, with more bearers in the United States than in any other country.
- PLPoland1 in 1M(measured from records)
- FIFinland1 in 796Kas Leontius
- LVLatvia1 in 941Kas Leonty
carrying the name, as counted by each country's national register. Where a country counts another spelling of the name rather than Leoncjusz 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.
- United States (measured from records)
- Sources
- 4 (measured from records)
- 1 in 1.0M (inferred from the name graph)
319 named Leonce, 2020
Highest-authority source
Poland
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
No verified etymology recorded for this name yet — the entries below are drawn from usage statistics and the name graph.
Attested across 9 languages in the etymology graph.
Where in the world(measured from records)
Leoncjusz 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 | |||
|---|---|---|---|---|---|
| US United States | 319as Leonce | 1 in 1M | 308 | — | 3 |
| PL Poland | 38 | 1 in 1M | 40 | Leoncjusz | 4 |
| BR Brazil | 26as Leonce | 1 in 8.1M | 26 | — | — |
| NL Netherlands | 18as Leonce | 1 in 960K | 15 | — | — |
| FI Finland | 7as Leontius | 1 in 796K | 61 | — | — |
| LV Latvia | 2as Leonty | 1 in 941K | 2 | — | — |
319 people counted by Census Bureau — First Name Frequency 2020 by sex, 2020. 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: Census Bureau — First Name Frequency 2020 by sex; DVV — Etunimitilasto (Finnish given names register); DVV — Nimipalvelu (Finnish name service, per-name lookup); dane.gov.pl — PESEL given names (first + second name position, 2026-01-20); dane.gov.pl — PESEL living persons (names); IBGE — names by decade (Kaggle mirror); Meertens NVB — Nederlandse Voornamenbank (all-time BRP bearer counts, 2018); PMLP — Personu vārdi (given names in population register). 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).
Notable people with this name(measured from records)
- Leontius of Caesareab. 250not in their usual nameBishop of Caesarea Mazaca
- Leontius Pełczyckib. 1505not in their usual namePolish Bishop
- Leoncjusz Ciuciurab. 1930PLPolish composer
- Leontius of TripoliLYnot in their usual nameRoman soldier and Christian martyr
- Leontius of AutunFRnot in their usual nameBishop of Autun
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).
Evidence(measured from records)
Attested in 3 sources across 1 country.
Reference works 1
- Wikidata name items (native-script + romanized given/family names)
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
- Is Leoncjusz a male or female name?
- Leoncjusz is a male name in our records. Opposite-gender entries fall within the cross-gender noise we measure in the source data, so we don't report them as usage.
- What are other forms of the name Leoncjusz?
- In the etymology graph, Leontius is a form of the same name in other languages.
- In which country does Leoncjusz have the most bearers?
- In the United States, the national register counted about 319 people named Leonce, more than in any other country we hold.
- Where is Leoncjusz most common?
- Measured as a share of residents rather than as a count, Leoncjusz is densest in Poland — about 1 in 1.0 million people — even though United States holds more of our records for it.
- How common is the name Leoncjusz?
- In Poland, the national register counted 38 people named Leoncjusz in 2026, about 1 in 1.0 million residents.
What do you want to know about Leoncjusz?
Nobody replies to these one by one, but what readers ask decides what these pages answer next.
Query this name via API
curl https://api.mondonomo.ai/api/v1/name-graph/leoncjuszThe same payload this page is built from: spellings and scripts, countries and languages, related names, and the registers that attest the form. Rate-limited for casual use; a free API key gives 1,000 requests a day, and bulk access is licensed separately.
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, “Leoncjusz”. Data snapshot 2026-10-10.