Is Rosilyn a boy or girl name?

Rosilyn is a girl’s name. Of the 642 Americans recorded with the name since 1880, 100.0% were girls and 0.0% were boys.

Rosilyn

Recorded 1930–2023 · United States

Rosilyn was most popular in 1949, when 22 American babies were given the name — ranking #3,423 that year. It was not recorded in 2025. Across 1880–2025 the Social Security Administration has recorded 642 people named Rosilyn.

Rosilyn over time

Births per year. The dot marks Rosilyn’s peak in 1949. Gaps are years the SSA suppressed, which it does for any name given to fewer than five babies.

Is Rosilyn a boy’s or a girl’s name?

Across the whole record Rosilyn is a girl’s name — 100.0% of the 642 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 Rosilyn

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See Rosilyn on the interactive charts

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