Noah Boy
NOH-uh
“rest, comfort” · Hebrew
#2
Cosmo
BoyItalian, Greek· “order, world”
- Meaning
- order, world
- Origin
- Italian, Greek
- Pronunciation
- KOZ-moh
- Syllables
- 2
- US rank 2025
- #1,934
- US babies 2025
- 80
- Best rank
- #933 (1913)
- Peak year
- 2022
Meaning and origin of Cosmo
Cosmo is an Italian and Greek name that means “order, world”.
Cosmo is an Italian form of the Greek Kosmas, from kosmos, order or world. Saints Cosmas and Damian were twin physicians martyred in the third century and are patron saints of doctors. Cosimo de' Medici, ruler of Florence, bore the Italian form Cosimo. Cosmo Kramer, the neighbor in the television sitcom Seinfeld, gave the name a comic association in the US. It is said KOZ-moh. The name also recalls the word cosmos, the universe.
Famous parents who chose Cosmo: Scarlett Johansson and Colin Jost (2021). More celebrity baby names
Popularity over time
Cosmo first appears in US Social Security records in 1910. It has ranked in the top 1,000 in 4 different years, starting in 1913. Its best national rank was #933 in 1913, and the most babies received it in 2022, when 99 were named Cosmo. In 2025, 80 babies were named Cosmo, and it ranked #1,934 nationally. That is 150% more than ten years earlier, so it is clearly on the rise.
Its national rank moved from #1,123 in 1920, #1,896 in 1950, #5,661 in 1980, #3,658 in 2000, #4,013 in 2010, and #1,934 in 2025. Of the 2,949 US boys named Cosmo since records began, 17% were born in the 2020s, its biggest decade. The 1920s come next, with 452 babies.
Other boys' names that peaked around the same time include Hardin, Mordecai, Jahaziel, Uzziah, and Jakhari.
Where it is most popular (2025)
In 2025, Cosmo ranked highest in Pennsylvania, New York, and California.
| State | Rank there | Babies |
|---|---|---|
| Pennsylvania | #1126 | 6 |
| New York | #1226 | 9 |
| California | #1311 | 14 |
| Texas | #2652 | 5 |
Gender, sound and spelling
About 99% of US babies named Cosmo over the last 20 years were boys, with a small share of girls.
Cosmo is usually pronounced KOZ-moh, with two syllables. It has five letters, starts with C and ends in “-mo”.
Middle names for Cosmo
A few middle names that flow with Cosmo: each avoids a matching first letter, a rhyme and a vowel clash where the names meet.
Sibling names for Cosmo
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Lists that include Cosmo
Frequently asked questions
What does the name Cosmo mean?
Cosmo is an Italian and Greek name that means “order, world”.
What is the origin of the name Cosmo?
Cosmo has Italian and Greek roots. Cosmo is an Italian form of the Greek Kosmas, from kosmos, order or world.
Is Cosmo a popular name?
Not especially. Cosmo ranked #1,934 in the US in 2025, which puts it outside the top 1,000.
Is Cosmo a boy or girl name?
Cosmo is mainly a boy's name. About 99% of US babies named Cosmo over the last 20 years were boys, with a small share of girls.
How do you pronounce Cosmo?
Cosmo is usually pronounced KOZ-moh. Stressed syllables are in capital letters.
Popularity figures come from US Social Security card applications (names given to at least five babies in a year, 1880 to 2025). How we source names and meanings