Casian

surname · Latin script

Recorded as a male name· opposite-gender records fall within measured source noise

/kasian/(machine-generated) pronunciation, model-generated

Casian is a surname written in the Latin script, with more bearers in Romania than in any other country. Recorded meaning: lat. Cassianus < Cassius, cf. eassus gol". I. 1. Casian (Arh.) ; Cdsiian pren. (17 A IV 128). 2. Cu apoc. : a) Casu (Ur XXII 338 ; Arh) ; -1, mold. (Sd XXII) ; -1, Nica (An.

rarermore common
  • MDMoldova≈1 in 8.2K(inferred from the name graph)
  • RORomania≈1 in 11K
  • ITItaly≈1 in 214K

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.

Romania (inferred from the name graph)

≈2,000 people, est.

Sources
73 (measured from records)

Highest-authority source

≈1 in 8.2K (inferred from the name graph)

Moldova, est.

measured from records inferred from the name graph

Name dossier (print, CSV)

Meaning & origin(measured from records)

lat. Cassianus < Cassius, cf. eassus gol". I. 1. Casian (Arh.) ; Cdsiian pren. (17 A IV 128). 2. Cu apoc. : a) Casu (Ur XXII 338 ; Arh) ; -1, mold. (Sd XXII) ; -1, Nica (An. C III 740) ; b) Casin spatar, 1576 (Sur XIX) ; -pin. (16 A III 465). c) Casan fam. mold. Cf. Casota, Casota ss. sau de in subst. c a s 5, c a s. 3. Prob. Cosian vecin, 1633 (D Gorj). II. Feminine : 1. Casiiana f. (As Br 112) ; Casdiana, mona. (Sd XIX 62). 2. Cu apoc. Casia f. (RI XI 92) ; a Cdsdii, mold, (Sd XXI) ; Casufa (Sd XVI $i XXII). Casan v. Casian I 2 c. Cassia, Casia v. Casian Cash' v. Casian I 2b. Casu v. Casian I 2 Cat/a, -ea, -Ina, -inca rina II 1, 2, 5, 6. Catalina v. E cater in a Catarina v. E cat erina Catarina v. Ecaterina 12, CatIna v. Ecaterina II 3. Catirina v. E cat e r i n a I 1 b. Catioca, -olu v. Ecaterina II 9, 12. CatIrlet v. G h e o r g h i e IV F 4. Catrea v. Ecaterina I8. Catrin/a, -ar, -u, -eseu v. E c a terin a I 1 b 3, 5. Catu v. Ecaterina II 2. Cabulea v. I a c o v II 11. Cildrea v. Co drat II 2. Cale, Calaeasa v. Nicola e III 13.

Sources 1

  • Dictionar Onomastic Rominesc

Attested in 1 language in the etymology graph.

Where in the world(measured from records)

Casian 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 Casian is recorded, by country
CountryMost common spellingSources
RO Romania≈2,000 est.≈1 in 11K—Casian19
MD Moldova≈410 est.≈1 in 8.2K72—5
US United States3021 in 1.1M348Casian73
IT Italy≈290 est.≈1 in 214K3—6
ES Spain531 in 944K53Casian17
DO Dominican Republic≈34 est.≈1 in 309K—Casian2
DK Denmark131 in 451K14——

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; e-services.md — living population register; INE — Padrón per-token widgets (current living counts, given + apellidos); INE — Apellidos más frecuentes (Padrón Municipal); Danmarks Statistik — Hvor mange hedder...? (living-population name counts); ISTAT — Contanomi newborn per-name series (1999–2024, JSONP backend). 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)

Casian is also recorded as 4 other names, 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, Romania, Israel

    Languages: English, German, Dutch

    Also written Casián

  • French surname3 spellings in the group

    Most recorded in France, United States, Romania, Belgium

    Also written Casián

  • a separate name2 spellings in the group

    Also written Casián

  • Hindi surname3 spellings in the group

    Most recorded in United States, Romania

    Also written Casián

34 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)

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)

FormalEstimado/a Casian,Dear Casian, (English)
InformalEstimado/a Casian,Hello, (English)

Evidence(measured from records)

Attested in 36 sources across 23 countries.

Official registers attesting Casian
CountryRegisterYearCountRank
US United StatesCensus Bureau — Surname Frequency 20202020348#62,198
US United StatesCensus Bureau — Surname Frequency 20102010302#65,593
US United StatesCensus Bureau — Surname Frequency 20002000256#71,143
ES SpainINE — Apellidos más frecuentes (Padrón Municipal)—53#43,027
ES SpainINE — Padrón per-token widgets (current living counts, given + apellidos)—53#42,563
DK DenmarkDanmarks Statistik — Hvor mange hedder...? (living-population name counts)—13#33,129
US United Stateswru Name Dictionary — US surnames, Census 2010 subset (Khanna et al.)———

Reference works 1

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

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

What does the name Casian mean?
Recorded meaning: lat. Cassianus < Cassius, cf. eassus gol". I. 1. Casian (Arh.) ; Cdsiian pren. (17 A IV 128). 2. Cu apoc. : a) Casu (Ur XXII 338 ; Arh) ; -1, mold. (Sd XXII) ; -1, Nica (An.
How do you pronounce Casian?
A machine transcription gives /kasian/ (IPA) for Spanish.
In which country does Casian have the most bearers?
Mondonomo estimates about 2.0 thousand people named Casian in Romania, more than in any other country we hold, where it is most often spelled casian.
How common is the name Casian?
In the United States, the national register counted 302 people named Casian in 2010, about 1 in 1.1 million residents.

What do you want to know about Casian?

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

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, “Casian”. Data snapshot 2026-10-10.

See how Casian parses inside a full name →