Is Cosimo a boy or girl name?

Cosimo is a boy’s name. Of the 1,016 Americans recorded with the name since 1880, 0.0% were girls and 100.0% were boys.

Cosimo

Recorded 1911–2025 · United States

Cosimo was most popular in 1927, when 30 American babies were given the name — ranking #2,675 that year. In 2025 it ranked #11,831, with 16 births. Across 1880–2025 the Social Security Administration has recorded 1,016 people named Cosimo.

Cosimo over time

Births per year. The dot marks Cosimo’s peak in 1927. Gaps are years the SSA suppressed, which it does for any name given to fewer than five babies.

Is Cosimo a boy’s or a girl’s name?

Across the whole record Cosimo is a boy’s name — 0.0% of the 1,016 Americans given it were girls and 100.0% were boys. In births since 2016 it is 0% girls and 100% boys.

Counted from every US birth the Social Security Administration recorded under this name, so it reflects use rather than opinion. A name given to fewer than five babies of one sex in a year is withheld at source and is not counted.

Names that peaked alongside Cosimo

Where Cosimo is most concentrated

How much more common the name is in each state than across the country as a whole.

New York 9.5×

Explore further

See Cosimo on the interactive charts

Source: U.S.A. Social Security Administration. Years 1880–2025. namelegacy.org