Sïz

surname · Latin script

Sïz is a surname written in the Latin script, with more bearers in Brazil than in any other country.

rarermore common
  • PLPoland1 in 6.4M(measured from records)
  • ARArgentina≈1 in 7.5M
  • BRBrazil1 in 7.6M

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.

Brazil (measured from records)

28 people

Sources
13 (measured from records)

Highest-authority source

1 in 6.4M (inferred from the name graph)

Poland

measured from records inferred from the name graph

Name dossier (print, CSV)

Spellings & scripts(measured from records)

One other spelling is counted as the same name:

Locally spelled Siz in ES Spain, PH Philippines, BR Brazil and 2 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

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)

Sïz 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.

Where Sïz is recorded, by country
CountryMost common spellingSources
BR Brazil281 in 7.6M28Siz7
AR Argentina≈6 est.≈1 in 7.5M—Sïz13
PL Poland61 in 6.4M6——
ES Spain———Siz8
PH Philippines———Siz4
GT Guatemala———Siz2
SV El Salvador———Siz3

28 people counted by IBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname). 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: IBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname); dane.gov.pl — PESEL living persons (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).

Other names spelled this way(inferred from the name graph)

Sïz is also recorded as another name, grouped separately because the records behind them do not connect to the one described above.

  • English surname9 spellings in the group

    Most recorded in United States, Germany, Philippines, Türkiye

    Languages: English, German, Dutch

    Also written Katlan, Siz, Katlãn

1 further group record this spelling and are not listed here.

Grouping is the name graph's, not a register's: two spellings join a group when the evidence links them, so a group is a claim about the records rather than about the people.

Evidence(measured from records)

No register attests this spelling yet

None of the official registers or reference works in our corpus lists Sïz under this spelling. The statistics on this page rest on person records, and the related names are inferred from the name graph.

Frequently asked questions

In which country does Sïz have the most bearers?
In Brazil, the national register counted about 28 people named Sïz, more than in any other country we hold, where it is most often spelled siz.
Where is Sïz most common?
Measured as a share of residents rather than as a count, Sïz is densest in Poland — about 1 in 6.4 million people — even though Brazil holds more of our records for it.
How common is the name Sïz?
In Brazil, the national register counted 28 people named Sïz, about 1 in 7.6 million residents.

What do you want to know about Sïz?

Nobody replies to these one by one, but what readers ask decides what these pages answer next.

Please leave out anyone's personal details (see Privacy).

Query this name via API
curl -H "X-API-Key: YOUR_KEY" https://api.mondonomo.ai/api/v1/name-graph/s%C3%AFz

The 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, “Sïz”. Data snapshot 2026-10-10.

See how Sïz parses inside a full name →