Cooper is an Old English occupational surname name meaning "barrel-maker" — and it has been climbing on the girls' side in the past decade, following the same gender-crossing path as Harper, Piper, and Parker. With 2,601 SSA records on the girls' side and a 2023 peak, Cooper-for-girls is a genuinely current development in American naming.
The Occupational Surname Wave
English occupational surnames — Fletcher, Cooper, Mason, Miller, Tanner — are deeply embedded in American naming tradition. On boys, Cooper has been a top-100 name since the 2010s. Its arrival on girls follows the established pattern: once a surname name reaches peak saturation on boys, parents start using it for daughters, often initially as a family surname honor name. Old English occupational names in this register carry an egalitarian quality: the barrel-maker's craft, elevated into a given name.
The Harper-Piper-Cooper Aesthetic
Cooper for a girl sits squarely in the same aesthetic family as Harper, Piper, and Roper: strong names without an explicitly feminine marker. They all share a particular sound quality: firm opening consonant, strong vowel, clean close. Harper and Piper are ahead of Cooper in this transition; compare Cooper and Harper to see two occupational surname names at different stages of their feminine adoption.
The Counter-Reading: Established as a Boys' Name
Cooper has been strongly coded male in American naming for over a decade; it's a recognizable boys' top-100 name. Using it for a girl means navigating that assumption constantly. Some parents actively choose names that challenge gender expectations; others find the explanation tiresome. Current rankings show just how dominant Cooper remains on the boys' side. The girl usage at 2,601 records is real but a fraction of the total. That gap will either narrow over time or Cooper will remain predominantly male; both outcomes are possible.