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Cosimo

#5,652 in 2025Boys' name

Form of Cosmas

Cosimo has been given to 1,016 babies in the U.S. since 1911. In 2025 it ranked #5,652 of 13,926 boys’ names in use. Its peak year was 1927, with 30 recorded.

Babies named Cosimo, 2025

1 in 207,000

Cosimo over time, 1880–2025

Boys
010203018801900192019401960198020002020

Based on births in the U.S. Babies given the name each year. Hover the chart — or focus it and use the arrow keys — for any year. Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.

Cosimo: meaning, origin, and history

Form of Cosmas

Deeper origin not confirmed in the cited records

What Cosimo means

Cosimo is a form of Cosmas.

Meaning behind the documented name family

The name developed through Cosimo → Cosmas. The family’s meaning is “order, world, universe”, recorded in the naming reference for Cosmas.

Origin, language, and formation

Cosimo is used in Italian.

Cosimo comes through Ancient Greek Κοσμᾶς.

Related names and everyday forms

Related names include Cosmas and Cosmo.

Pronunciation and spelling

In Italian, Cosimo is pronounced /ˈkɔ.si.mo/.

American usage and historical context

In the United States, 1,016 boys were recorded with the name Cosimo between 1911 and 2025. Its highest annual count was 30 in 1927; its best national rank was #1,354 in 1927.

Over 5 years its rank rose, from #7,621 in 2020 to #5,652 in 2025. Over 10 years its rank rose, from #8,166 in 2015 to #5,652 in 2025.

Sources & methodologyReferences, data & attribution

Meaning, origin, and language notes draw on the references below.

American popularity figures use published Social Security Administration records for this exact spelling. Counts below five for a name, sex, and year are omitted.

Wiktionary material is available under CC BY-SA 4.0.

How common is Cosimo?

Everything below is computed from the 2025 data — the most recent year available.

Among all babies, 2025
1 in 207,000
16 of 3,315,165 births
Among boys only
1 in 107,000
<0.01% of boys
Rank, 2025
#5,652
of 13,926 boys’ names in use
Coin-flip room size
143,620 kids
Even odds of a second one

Where Cosimo sits on the popularity scale

Rarest published (5 a year)#1 — Liam (20,818)

Chance at least one other child shares the name

If the other children were drawn at random from the 2025 national name distribution. Real classrooms cluster by region and community, so treat these as a floor, not a ceiling.

Class of 20Under 1%
Class of 30Under 1%
Grade of 100Under 1%
School of 500Under 1%

Put another way: gather 143,620 children born in 2025 and it's an even bet that one of them is another Cosimo. In a class of 30 the chance is Under 1%.

When Cosimos were born

Half of everyone ever recorded as Cosimo was born before 1948 — so the typical Cosimo is around 77 today.

Median birth year
1948
About 77 years old
Biggest decade
1920s
21.5% of all use
Born in the last 25 years
22.3%
Spread across generations
Recorded since 1950
492
People you could plausibly meet
Choose a decade

1920s — 21.5% of all recorded uses (218).

Is Cosimo rising or falling?

Rank movement and count movement can disagree — the number of distinct names in use keeps growing, so a name holding a steady count still slides down the list. Both are shown.

Rank vs 1 year ago
−552
Places dropped
Rank vs 5 years ago
+1,969
Places climbed
Rank vs 10 years ago
+2,514
Places climbed
Births vs 10 years ago
1.78×
More babies than then
Share of its own peak
53.3%
Peak was 1927 (30)
Years since peak
98
Years
Year-to-year steadiness
Volatile
35.5% average annual change
Best rank ever
#1,354
1927

Spellings of Cosimo

Cosimo is not the most common spelling — Cosmo is, with 55.2% against Cosimo's 19.0%.

Grouped by closeness of spelling (up to two letter changes), same sex, with a floor on all-time use. It catches Sophia/Sofia and Aiden/Ayden, and misses spellings that sound alike but look different, like Sean and Shawn.

Where Cosimo is used

Across 1910–2025, Cosimo was most concentrated in New York — about 1 in 100,000 boys, against 1 in 173,383 across all states with data. It was least common in Pennsylvania (1 in —).

01 per 100,000

Most concentrated

  1. 1New York1 in 100,000
  2. 2California1 in —
  3. 3New Jersey1 in —
  4. 4Pennsylvania1 in —

Shading is the share of that state's recorded boys given this name, not the raw count — otherwise the map would just show which states are biggest. Unshaded states have no published records for this period. U.S. birth records suppress state-year counts below 5; state counts therefore don't add up to the national total. Every state links to its full rankings. Cosimo has too little recent state data to map, so this covers all years from 1910.

Cosimo around the world

Where Cosimo ranks in official birth records elsewhere in the world. Rankings only — the number of births isn’t comparable between places, so it isn’t shown.

  • England & Wales
    1999–2025
    #2,952
    in 2025
  • France
    1928–2025
    #4,003
    in 2025
  • Canada
    1992–2018
    #2,905
    in 2018
  • South Australia
    1954–2002
    #606
    in 2002

Popularity data from Office for National Statistics, Institut national de la statistique et des études économiques, Statistics Canada and Consumer and Business Services (South Australia). ONS data under Open Government Licence v3.0. INSEE data under Licence Ouverte / Etalab 2.0. StatCan data under Statistics Canada Open Licence. CBS SA data under CC BY 4.0.

Cosimo by the numbers

The raw record for each sex the name is used for.

As a boy's name

Rank in 2025
#5,652
Trend vs 5 yrs ago
Up 1,969
Best rank ever
#1,354
1927
Peak year
1927
30 that year
First recorded
1911
Last recorded
2025
All-time count
1,016
Count in 2025
16

Names similar to Cosimo

Matched on shared beginnings and endings, similar length, and comparable popularity.

CosmeCosmoCostaPrimoCostonCostasCosmosCosmasMassimoMaximoJeronimoCosbyOnesimoGeronimoTimoKimoCostelloCossieMossimoCosminCostnerAntimoOnecimoCostantino

Sibling names for Cosimo

Names from the same era and popularity tier — the two things that make a sibling set feel deliberate — skipping lookalike spellings and shared initials.

Explore around Cosimo

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