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).
Kenzie
Kenzie is now well below its former popularity. All-time it's been given to 25,120 U.S. babies, the 962nd most common name by sound today, peaking at 1,518 in 2014, with 418 in 2025.
By sound, Kenzie also includes the spellings Kenzi.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).