Is Wiliam a boy or girl name?

Wiliam is a boy’s name. Of the 1,256 Americans recorded with the name since 1880, 0.0% were girls and 100.0% were boys.

Wiliam

Recorded 1881–2025 · United States

Wiliam was most popular in 1982, when 28 American babies were given the name — ranking #4,816 that year. In 2025 it ranked #13,540, with 13 births. Across 1880–2025 the Social Security Administration has recorded 1,256 people named Wiliam.

Wiliam over time

Births per year. The dot marks Wiliam’s peak in 1982. Gaps are years the SSA suppressed, which it does for any name given to fewer than five babies.

Is Wiliam a boy’s or a girl’s name?

Across the whole record Wiliam is a boy’s name — 0.0% of the 1,256 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 Wiliam

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See Wiliam on the interactive charts

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