Is Willo a boy or girl name?

Willo is a girl’s name. Of the 637 Americans recorded with the name since 1880, 100.0% were girls and 0.0% were boys.

Willo

Recorded 1911–2025 · United States

Willo was most popular in 1924, when 23 American babies were given the name — ranking #3,246 that year. In 2025 it ranked #17,163, with 9 births. Across 1880–2025 the Social Security Administration has recorded 637 people named Willo.

Willo over time

Births per year. The dot marks Willo’s peak in 1924. Gaps are years the SSA suppressed, which it does for any name given to fewer than five babies.

Is Willo a boy’s or a girl’s name?

Across the whole record Willo is a girl’s name — 100.0% of the 637 Americans given it were girls and 0.0% were boys. In births since 2016 it is 100% girls and 0% 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 Willo

Explore further

See Willo on the interactive charts

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