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).
Jaylen is down from its peak but still widely used. All-time it's been given to 173,873 U.S. babies, the 262nd most common name by sound today, peaking at 8,690 in 2007, with 2,462 in 2025.
By sound, Jaylen also includes the spellings Jalen, Jaylin, Jaelyn, Jaylynn, Jaelynn, Jaylyn, Jalyn, Jailyn, Jaylan, Jalynn.
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).