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Cillo

Cillo. Attested in United States of America, Italy, Spain, Belgium, Denmark, borne by about 1,035 people in the registers this map holds.

The same name, spelt two ways

One systematic substitution — s for z, w for v, ch for h — where BOTH spellings are independently attested surnames. Kosina and Kozina are one man in two clerks' handwriting. Stronger than sounding alike, weaker than somebody having checked.

Killo

Only sounds alike

An algorithm's guess. Useful for casting a net, and not evidence.

CelloCieloCilioCillaCilliCillyCioloCiulo

What Wiktionary says this name is

Copied from the surname template on Wiktionary, not worked out here, and not from its etymology prose. Anyone may edit it; the page and the revision it was read at are linked below.

  • Italian what the English entry says it is from
  • English · Italian recorded as a surname in these languages

    A language here is the language of the NAME, not a country a family came from — the same caveat the Wikidata section carries, and worth repeating rather than assumed read.

Cillo on Wiktionary ↗ — read at revision 91076737. Text from Wiktionary, by its contributors, under CC BY-SA 4.0.

It is also the name of a place

This is as close to an origin as this map will go. A surname that is also a place name often came from it — and often did not: plenty are occupations or patronymics that happen to collide with a place, and plenty of places are named after a family rather than the other way round. It is a fact with a source, which is more than an etymology page offers.

  • Cielo Italy pop. 18 only a phonetic neighbour, not a spelling
  • Cello Spain only a phonetic neighbour, not a spelling
  • Cillà Italy only a phonetic neighbour, not a spelling

Where it is borne, and where a record names it

Attested in 5 countries: United States of America, Italy, Spain, Belgium, DenmarkDenmark — attested, not countedBelgium — 6 peopleSpain — 20 peopleItaly — 386 peopleUnited States of America — 623 people
A dot is a country, not a place. It sits at the country's centre because a national register counts a country; nothing here says where in it these people are. A hollow ring is attested but not counted — Denmark publishes which surnames exist and not how many carry each, and a family archive finds a name without counting heads. Sizing those by a number nobody published would invent it. Blank is not absence. This draws the 5 countries where the eleven registers and eight archives behind this atlas attest the name. Most of the world has no surname register this project can read, and the ones that do and will not are listed with the reason.
Belgium, by commune. 6 people in 1 of Belgium's 565 communes, counted by Statbel. The biggest is Aalst with 6. This is the only country here that can be drawn this way — every other register counts a country and stops, so a blank elsewhere is a gap in what states publish, not in the name.
1 place drawn, the largest being AalstAalst — 6

Country by country

Each country below can carry up to three different kinds of evidence, and none of them is the same claim. A register is a head-count — a state counted these people. A record is one document naming the surname on that ground, narrower evidence and often much older. And a volume overlapping these dates is a document from the right place and years — never a document known to name this surname. None of the three ever means the name exists in that country and nowhere else, or that it exists nowhere but here.

United States of America

623 Borne — a state counted them — Frequently Occurring Surnames from the 2010 Census; Frequently Occurring Surnames from the 2000 Census.

Whose archive to write to

2,999 of 528,875 volumes held for United States of America overlap the 1980s — the decades Cillo is attested here. Too many to list, and this atlas does not know whether any one of them names Cillo. The commonest kinds: Civil registration and vital records, Probate, land and notarial, Church and parish registers, Cemeteries and burials. See everything this atlas holds for United States of America →

Italy

386 Borne — a state counted them — Falco; Italian comuni publishing their residents' surnames as open data, indexed by the national catalogue dati.gov.it..

Whose archive to write to

59,963 of 1,288,913 volumes held for Italy overlap the 1710s, 1930s, 1940s, 1950s, 1970s, 1980s, 1990s and 2000s — the decades Cillo is attested here. Too many to list, and this atlas does not know whether any one of them names Cillo. The commonest kinds: Civil registration and vital records, Church and parish registers. See everything this atlas holds for Italy →

Spain

20 Borne — a state counted them — Frecuencia de apellidos, Censos de población (INE).

Whose archive to write to

4,776 of 35,936 volumes held for Spain overlap the 1850s and 1980s — the decades Cillo is attested here. Too many to list, and this atlas does not know whether any one of them names Cillo. The commonest kinds: Church and parish registers, Probate, land and notarial, Immigration and emigration. See everything this atlas holds for Spain →

Belgium

6 Borne — a state counted them — Family names by municipality, 1 January 2026 (Statbel, TA_POP_LST_2026).

Whose archive to write to

This atlas has no birth-year evidence for Cillo in Belgium, so it cannot narrow Belgium's 24,426 volumes by date — see Belgium's own page for all of it.

Denmark

Borne — a state counted them — Navne registreret i Danmark, January 2020 (Danmarks Statistik, republished by Digitaliseringsstyrelsen).

Whose archive to write to

This atlas has no birth-year evidence for Cillo in Denmark, so it cannot narrow Denmark's 4,099 volumes by date — see Denmark's own page for all of it.

Whose archive held that ground, and when

Every surname site can tell you a name is common somewhere. This one also knows which filing system held that ground in which years — and those are the two halves of one question: my people were called this, they were there, so who has the paper, and for which century. A name in Croatia before 1881 may sit in a military series and not a county one; a name in the Netherlands before 1811 has no civil record at all, only a baptism.

This is about the ground, not about your family. A register counting a name in a country says nothing about which village. And these are the pieces of a country this atlas has drawn, which in a large one may be a corner of it — Acadia reaches into Maine and is not a statement about the United States, and Bohemia's ground crosses into Poland. Each region's own page says which ground it covers. Where a country is missing below, nothing covers it yet.

United States of America
Italy
  • Carnia, Friuli 6 eras Patriarchate of Aquileia → Republic of Venice → Austria → Napoleonic Kingdom of Italy → …
  • Campania — Caserta and Naples 5 eras Kingdom of Naples → Napoleonic Kingdom of Naples → Kingdom of the Two Sicilies → Kingdom of Italy → …
  • Eastern Sicily — Catania 4 eras Kingdom of Sicily → Kingdom of the Two Sicilies → Kingdom of Italy → Italy
  • Calabria 4 eras Kingdom of Naples → Napoleonic Kingdom of Naples → Kingdom of the Two Sicilies → Italy
  • Carniola and the Slovene lands 8 eras Inner Austria → Austria → The Illyrian Provinces → Kingdom of Serbs, Croats and Slovenes, then Yugoslavia → …
Belgium
Denmark
  • Denmark 4 eras Denmark–Norway → Denmark, after the loss of Norway → Prussia, then the German Empire → Denmark

No record region is drawn yet for Spain — which is a gap in this atlas and not a statement about that country.

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