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).
Leighton
Leighton has been climbing in recent years. All-time it's been given to 35,150 U.S. babies, the 475th most common name by sound today, peaking at 1,673 in 2019, with 1,566 in 2025.
By sound, Leighton also includes the spellings Layton.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).