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).
Jayceon
Jayceon is now well below its former popularity. All-time it's been given to 13,580 U.S. babies, the 1,083rd most common name by sound today, peaking at 2,022 in 2014, with 445 in 2025.
Jayceon has no common alternate spellings by sound.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).