Is Isidore a boy or girl name?

Isidore is a boy’s name. Of the 3,421 Americans recorded with the name since 1880, 0.0% were girls and 100.0% were boys.

Name Legacy

Isidore

Recorded 1881–2025 · United States

Isidore was most popular in 1919, when 183 American babies were given the name — ranking #924 that year. In 2025 it ranked #7,732, with 31 births. Across 1880–2025 the Social Security Administration has recorded 3,421 people named Isidore.

Isidore over time

Births per year. The dot marks Isidore’s peak in 1919. Gaps are years the SSA suppressed, which it does for any name given to fewer than five babies.

Is Isidore a boy’s or a girl’s name?

Across the whole record Isidore is a boy’s name — 0.0% of the 3,421 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 Isidore

Where Isidore is most concentrated

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

New York 12.5×

Explore further

See Isidore on the interactive charts

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