Sįs
surname · Latin script
Sįs is a surname written in the Latin script, with more bearers in the United States than in any other country.
- USUnited States1 in 726K(measured from records)
- BRBrazil1 in 740K
- CRCosta Rica1 in 1M
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)
- Record sources
- 73 (measured from records)
- 1 in 726K (inferred from the name graph)
458 people, 2010
corpus datasets behind its best-documented spelling
strongest: highest-authority source
United States
measured from records inferred from the name graph
Spellings & scripts
(measured from records)One other spelling is counted as the same name:
Locally spelled Sis in US United States.
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)sau cf. Sisinie si Sisoe, sau subst. sis. Coincidente dac Sisie, Sisinus bb., Sisa si Sisia ff. 1. Sirul munte In Istria (DR I 196) ; Sisesti, scris si Sisesti s. olt. 2. .isa b. (13-15 B 69) si Sip b. 1415 (Rep D 37; Div 53) poate fi aceiasi persoana. 3. Giurca (AO XVII 310) ; Sisescu (Tis ; Gorj 72).
Cited for this meaning 3
- Digital Pāḷi Dictionary
- Lietuvių pavardžių žodynas (Dictionary of Lithuanian Surnames)
- Dictionar Onomastic Rominesc
Attested across 20 languages in the etymology graph.
Where in the world
(measured from records)Sįs 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 | 458 | 1 in 726K | 709 | Sis | 13 |
| BR Brazil | 286 | 1 in 740K | 286 | — | — |
| ES Spain | 21 | 1 in 2.4M | 21 | — | 3 |
| CR Costa Rica | 5 | 1 in 1M | 5 | — | — |
| IN India | 5 | 1 in 265M | 5 | — | — |
| CH Switzerland | 4 | 1 in 2.1M | 4 | — | — |
458 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 — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname); INE — Padrón per-token widgets (current living counts, given + apellidos); INE — Apellidos más frecuentes (Padrón Municipal); TSE — electoral roll (padrón) names; Instate — India surnames (clean spellings) from electoral rolls; BFS — Familiennamen der Wohnbevölkerung (surnames). 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)No register attests this spelling yet
Frequently asked questions
- In which country does Sįs have the most bearers?
- In the United States, the national register counted about 458 people named Sįs, more than in any other country we hold, where it is most often spelled sis.
- Where is Sįs most common?
- Sįs is densest in the United States, where the national register counts about 1 in 726 thousand people carrying it.
- How common is the name Sįs?
- In the United States, the national register counted 458 people named Sįs in 2010, about 1 in 726 thousand residents.
What do you want to know about Sįs?
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/s%C4%AFsThe 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, “Sįs”. Data snapshot 2026-10-13.