Sillas
surname · Latin script
Recorded as a male name· opposite-gender records fall within measured source noise
/siʝas/(machine-generated) pronunciation, model-generated
Sillas is a surname written in the Latin script, with more bearers in the United States than in any other country.
- ESSpain1 in 385K(measured from records)
- USUnited States1 in 390K
- CRCosta Rica1 in 2.5M
carrying the name, as counted by each country's national register. One hue, darker where it is more common; hover a country for its figure.
- United States (measured from records)
- Sources
- 69 (measured from records)
- 1 in 385K (inferred from the name graph)
854 people, 2010
Highest-authority source
Spain
measured from records inferred from the name graph
Meaning & origin
No verified etymology recorded for this name yet — the entries below are drawn from usage statistics and the name graph.
Sources 1
Attested in 1 language in the etymology graph.
Where in the world(measured from records)
Sillas 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 | 854 | 1 in 390K | 931 | Sillas | 11 |
| ES Spain | 130 | 1 in 385K | 130 | — | — |
| PL Poland | 3 | 1 in 13M | 3 | — | — |
| CR Costa Rica | 2 | 1 in 2.5M | 2 | — | — |
| BR Brazil | — | — | 846 | Sillas | 69 |
854 people counted by Census Bureau — Surname Frequency 2010, 2010. 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 — Surname Frequency 2010; Census Bureau — Surname Frequency 2020; IBGE — names by decade (Kaggle mirror); INE — Padrón per-token widgets (current living counts, given + apellidos); INE — Apellidos más frecuentes (Padrón Municipal); dane.gov.pl — PESEL living persons (surnames); TSE — electoral roll (padrón) names. 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)
- Karen Sillasb. 1963USAmerican stage and film actress
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)
Evidence(measured from records)
Attested in 21 sources across 11 countries.
| Country | Register | Year | Count | Rank |
|---|---|---|---|---|
| US United States | Census Bureau — Surname Frequency 2020 | 2020 | 931 | #27,432 |
| US United States | Census Bureau — Surname Frequency 2010 | 2010 | 854 | #28,049 |
| US United States | Census Bureau — Surname Frequency 2000 | 2000 | 679 | #32,059 |
| BR Brazil | IBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname) | — | 206 | #35,921 |
| ES Spain | INE — Apellidos más frecuentes (Padrón Municipal) | — | 130 | #22,825 |
| ES Spain | INE — Padrón per-token widgets (current living counts, given + apellidos) | — | 130 | #22,772 |
| PL Poland | dane.gov.pl — PESEL living persons (surnames) | 2026 | 3 | — |
| PL Poland | dane.gov.pl — PESEL living persons (names) | — | 3 | #289,414 |
| CR Costa Rica | TSE — electoral roll (padrón) names | — | 2 | #17,611 |
| US United States | wru Name Dictionary — US surnames, Census 2010 subset (Khanna et al.) | — | — | — |
Reference works 2
- Wikidata name items (native-script + romanized given/family names)
- 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
- How do you pronounce Sillas?
- A machine transcription gives /siʝas/ (IPA) for Spanish.
- In which country does Sillas have the most bearers?
- In the United States, the national register counted about 854 people named Sillas, more than in any other country we hold, where it is most often spelled sillas.
- Where is Sillas most common?
- Measured as a share of residents rather than as a count, Sillas is densest in Spain — about 1 in 385 thousand people — even though United States holds more of our records for it.
- How common is the name Sillas?
- In the United States, the national register counted 854 people named Sillas in 2010, about 1 in 390 thousand residents.
What do you want to know about Sillas?
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/sillasThe 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, “Sillas”. Data snapshot 2026-10-10.