Saiu
surname · Latin script
Recorded for both men and women· direction only, no split published
Saiu is a surname written in the Latin script, with more bearers in Belgium than in any other country.
- BEBelgium1 in 273K(measured from records)
- CHSwitzerland1 in 600K
- NLNetherlands1 in 2.9M
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.
- Belgium (measured from records)
- Sources
- 81 (measured from records)
- 1 in 273K (inferred from the name graph)
43 people, 2008
Highest-authority source
Belgium
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.
Where in the world(measured from records)
Saiu 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 | |||
|---|---|---|---|---|---|
| BE Belgium | 43 | 1 in 273K | 43 | Saiu | 10 |
| CH Switzerland | 14 | 1 in 600K | 14 | — | — |
| ES Spain | 8 | 1 in 6.3M | 8 | — | 1 |
| NL Netherlands | 6 | 1 in 2.9M | 6 | — | — |
| FR France | ≈5 est. | ≈1 in 14M | 11 | Saiu | 81 |
| CZ Czechia | 2 | 1 in 5.4M | 2 | — | — |
43 people counted by Familienaam.be — Belgian family-name frequency (population register), 2008. 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: INSEE — Fichier des noms de famille (1891–2000); Familienaam.be — Belgian family-name frequency (population register); BFS — Familiennamen der Wohnbevölkerung (surnames); INE — Padrón per-token widgets (current living counts, given + apellidos); CBG Familienamenbank — Dutch surname bearer counts (GBA/BRP 2007); MVČR — living population register 2017. 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)
Saiu is also recorded in 4 other lexicons, as a different name or as an ordinary word. These are senses of the spelling, not of the name above.
In cdo, the twelve animals used to designate ‘the year of one’s birth, (singsain)
as a wordDictionary of the Foochow Dialect
In cdo, to kill, to slay, to put to death, to seize, to sweep away (3%)
as a wordDictionary of the Foochow Dialect
In Galician, third-person singular preterite indicative of sair
as a wordkaikki.org Wiktionary extract (IPA + transliterations)
In Estonian, partitive plural of sai
as a wordkaikki.org Wiktionary extract (IPA + transliterations)
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.
Evidence(measured from records)
Attested in 14 sources across 11 countries.
Reference works 2
- Nederlandse FamilienamenBank (Dutch surname bank; ex-Meertens Instituut, now CBG)2007
- Cognomix.it (Nomix s.r.l.) — Italian surname origin dictionary
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
- In which country does Saiu have the most bearers?
- In Belgium, the national register counted about 43 people named Saiu, more than in any other country we hold, where it is most often spelled saiu.
- Where is Saiu most common?
- Saiu is densest in Belgium, where the national register counts about 1 in 273 thousand people carrying it.
- How common is the name Saiu?
- In Belgium, the national register counted 43 people named Saiu in 2008, about 1 in 273 thousand residents.
What do you want to know about Saiu?
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/saiuThe 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, “Saiu”. Data snapshot 2026-10-10.