How to read the band →
Solid line = floor (spellings that unambiguously belong to the group). Shaded band up to the dashed edge = ceiling (the most it could reach if every ambiguous spelling counted here).
Kelsey
Kelsey is now well below its former popularity. All-time it's been given to 198,470 U.S. babies, the 897th most common name by sound today, peaking at 14,409 in 1992, with 538 in 2025.
By sound, Kelsey also includes the spellings Kelsie, Kelsi, Kelsea, Kelcie, Kelsy.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).