Holding steady, #5,608 for boys today.
Popularity of Cosimo since 1911
Babies named Cosimo per year in U.S. Social Security records.
Data table (by decade)
| Decade | Boys |
|---|---|
| 1910s | 123 |
| 1920s | 218 |
| 1930s | 91 |
| 1940s | 92 |
| 1950s | 70 |
| 1960s | 62 |
| 1970s | 40 |
| 1980s | 50 |
| 1990s | 37 |
| 2000s | 68 |
| 2010s | 80 |
| 2020s | 85 |
Meaning & origin
Cosimo is a rare but historically resonant Italian name, strongly associated with the Medici family of Renaissance Florence. In the United States, its recorded usage dates back to 1911, with a peak in popularity during 1927. As of 2025, it ranks 5,608 and is given to roughly 1 in 106,755 newborn boys, reflecting its continued but niche appeal. The name has shown a stable trajectory in recent years, never falling out of use entirely but never entering the mainstream outside of Italian-American communities.
Cosimo is the Italian form of the Greek name Kosmas (Κοσμᾶς), which means 'order' or 'decoration.' It is also connected to the Greek word kosmos, meaning 'world' or 'universe,' leading to associations with the cosmos. The name was borne by members of the Medici family in Renaissance Florence, most notably Cosimo de' Medici (the Elder) and Cosimo I de' Medici, Grand Duke of Tuscany, which cemented its use in Italian naming traditions.
Nicknames & variants
Nicknames: Cos, Cosi, Mimo
Sibling names for Cosimo
Names that share Cosimo's style, for a brother or sister.
