Ľach
surname · Latin script
Ľach is a surname written in the Latin script, with more bearers in Poland than in any other country. Recorded meaning: Borrowed from Old Ruthenian лѧхъ (ljax), from Old East Slavic лѧхъ (lęxŭ), from Proto-Slavic *lęxъ, from earlier Proto-Slavic *lędxъ, hypocorism of Proto-Slavic *lęděninъ, from Proto-Slavic *lędo (“fa.
- PLPoland1 in 3.7K(measured from records)
- SKSlovakia1 in 29K
- CZCzechia1 in 54K
carrying the name, as counted by its national register where one exists and as Mondonomo estimates it elsewhere (marked ≈ and "est." on hover). One hue, darker where it is more common; hover a country for its figure.
- Poland (measured from records)
- 2 (measured from records)
- Sources
- 115 (measured from records)
- 1 in 3.7K (inferred from the name graph)
10,388 people, 2026
recorded for this name
Highest-authority source
Poland
measured from records inferred from the name graph
Spellings & scripts(measured from records)
One other spelling is counted as the same name:
Locally spelled Lach in PL Poland, US United States, CZ Czechia and 5 more.
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)
- Old Ruthenianлѧхъljax(measured from records)
- Old East Slavicлѧхъlęxŭ(measured from records)
- Proto-Slavic*lęxъ(measured from records)
- Proto-Slavic*lędo“fallow“fallow, uncultivated field”(measured from records)
Borrowed from Old Ruthenian лѧхъ (ljax), from Old East Slavic лѧхъ (lęxŭ), from Proto-Slavic *lęxъ, from earlier Proto-Slavic *lędxъ, hypocorism of Proto-Slavic *lęděninъ, from Proto-Slavic *lędo (“fallow, uncultivated field”) + Proto-Slavic *-ěninъ. Originally, the word referred to the Lendians tribe (cf. Old Polish Lędzanie), then passed to the Poles. Alleged relation with Lech unclear.
Sources 2
- Dictionary of American Family Names
- Wiktionary
Attested across 15 languages in the etymology graph.
Where in the world(measured from records)
Ľach 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 | ||||
|---|---|---|---|---|---|---|
| PL Poland | #340 | 10,388 | 1 in 3.7K | 5.2K | Lach | 115 |
| CN China | — | ≈7,900 est. | ≈1 in 176K | — | Lach | 1 |
| US United States | — | 2,515 | 1 in 132K | 2.5K | Lach | 79 |
| BR Brazil | — | 605 | 1 in 350K | 605 | — | 1 |
| GB United Kingdom | — | ≈480 est. | ≈1 in 136K | — | Lach | 29 |
| MA Morocco | — | ≈480 est. | ≈1 in 74K | — | Lach | 13 |
| CZ Czechia | — | 197 | 1 in 54K | 197 | Lach | 29 |
| SK Slovakia | — | 187 | 1 in 29K | 187 | Lach | 22 |
| NO Norway | — | 76 | 1 in 72K | 76 | Lach | 7 |
10,388 people counted by dane.gov.pl — PESEL living persons (surnames), 2026. 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: dane.gov.pl — PESEL living persons (surnames); Census Bureau — Surname Frequency 2010; IBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname); MVČR — living population register 2017; JÚĽŠ SAV — Databáza priezvisk na Slovensku (surname database, 1995 census); SSB — Navnesøk (name-search service, living population). 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).
Evidence(measured from records)
Attested in 1 sources across 1 country.
| Country | Register | Year | Count | Rank |
|---|---|---|---|---|
| SK Slovakia | JÚĽŠ SAV — Databáza priezvisk na Slovensku (surname database, 1995 census) | 1995 | 105 | — |
Register rows as of the 2026-10-09 data build.
Frequently asked questions
- What does the name Ľach mean, and where does it come from?
- Borrowed from Old Ruthenian лѧхъ (ljax), from Old East Slavic лѧхъ (lęxŭ), from Proto-Slavic *lęxъ, from earlier Proto-Slavic *lędxъ, hypocorism of Proto-Slavic *lęděninъ, from Proto-Slavic *lędo (“fa… Recorded by Dictionary of American Family Names and Wiktionary.
- In which country does Ľach have the most bearers?
- In Poland, the national register counted about 10 thousand people named Ľach, more than in any other country we hold, where it is most often spelled lach.
- Where is Ľach most common?
- Ľach is densest in Poland, where the national register counts about 1 in 3.7 thousand people carrying it.
- How common is the name Ľach?
- In Poland, the national register counted 10,388 people named Ľach in 2026, about 1 in 3.7 thousand residents.
- How common is Ľach compared with other names?
- In Poland, Ľach is the 340th most common surname of 240,840 surnames recorded there.
What do you want to know about Ľach?
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/%C4%BEachThe 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, “Ľach” — the 340th most common surname in Poland. Data snapshot 2026-10-10.