Dellai

surname · Latin script

(measured from records)Officially recorded in 7 countries · latest register: BFS, 2024

/dɛllaj/(machine-generated) Portuguese · model-generated

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

  • CHSwitzerland1 in 382K(measured from records)
  • BRBrazil1 in 1M
  • CZCzechia1 in 5.4M

carrying the name, as counted by its national register where one exists and as Mondonomo estimates it elsewhere (marked ≈ and "est." on hover). Countries with no figure are shown too: flat where a national register lists the name without counting it, hatched where only our records hold it. One hue, darker where it is more common; hover a country for its figure.

Brazil (measured from records)

209 people

Record sources
69 (measured from records)

corpus datasets behind its best-documented spelling

strongest: highest-authority source

1 in 382K (inferred from the name graph)

Switzerland

measured from records inferred from the name graph

Name dossier (print, CSV)Make your nomograph ✦

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)

Dellai 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 Dellai is recorded, by country
CountryMost common spellingSources
BR Brazil2091 in 1M209——
CH Switzerland221 in 382K22—1
TN Tunisia≈14 est.≈1 in 900K—Dellai2
ES Spain71 in 7.1M7—1
FR France≈3 est.≈1 in 26M10Dellai69
BE Belgium21 in 5.9M2—1
CZ Czechia21 in 5.4M2——

209 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: INSEE — Fichier des noms de famille (1891–2000); IBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname); BFS — Familiennamen der Wohnbevölkerung (surnames); INE — Padrón per-token widgets (current living counts, given + apellidos); Familienaam.be — Belgian family-name frequency (population register); 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 names spelled this way

(inferred from the name graph)

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

  • English surname5 spellings in the group

    Most recorded in United States, Germany, Italy, Australia

    Languages: English, German

    Also written Dellaï

27 further groups 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.

Notable people with this name

(measured from records)
19201940196019802000Ana María Dellai, b. 1929Lorenzo Dellai, b. 1959Eveline Dellai, b. 1993Silvia Dellai, b. 1993Matteo Dellai, b. 1996Luca Dellai, b. 1996

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)
FormalPrezado(a) Dellai,Dear Dellai, (English)
InformalPrezado(a) Dellai,Hello, (English)

Evidence

(measured from records)

9 registers and reference works attest this spelling, across 7 countries.

Official registers attesting Dellai
CountryRegisterYearCountRank
BR BrazilIBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname)—209#35,493
CH SwitzerlandBFS — Familiennamen der Wohnbevölkerung (surnames)202422#34,100
FR FranceINSEE — Fichier des noms de famille (1891–2000)199110—
FR FranceINSEE — Fichier des noms de famille (1891–2000)19718—
FR FranceINSEE — Fichier des noms de famille (1891–2000)19518—
ES SpainINE — Padrón per-token widgets (current living counts, given + apellidos)—7#143,513
FR FranceINSEE — Fichier des noms de famille (1891–2000)19816—
FR FranceINSEE — Fichier des noms de famille (1891–2000)19215—
FR FranceINSEE — Fichier des noms de famille (1891–2000)19614—
BE BelgiumFamilienaam.be — Belgian family-name frequency (population register)20082#153,272
CZ CzechiaMVČR — living population register 2017—2#177,562
FR FranceINSEE — Fichier des noms de famille (1891–2000)19412—

Reference works 2

  • Wikidata name items (native-script + romanized given/family names)
  • 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

How do you pronounce Dellai?
It depends on the language: in Portuguese /dɛllaj/; in Italian /dɛllai/. Transcriptions are machine-generated except where a dictionary is named.
In which country does Dellai have the most bearers?
In Brazil, the national register counted about 209 people named Dellai, more than in any other country we hold.
Where is Dellai most common?
Measured as a share of residents rather than as a count, Dellai is densest in Switzerland — about 1 in 382 thousand people — even though Brazil holds more of our records for it.
How common is the name Dellai?
In Brazil, the national register counted 209 people named Dellai, about 1 in 1.0 million residents.

What do you want to know about Dellai?

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

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, “Dellai”. Data snapshot 2026-10-13.

See how Dellai parses inside a full name →