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).
Colter
Colter has been climbing in recent years. All-time it's been given to 10,705 U.S. babies, the 507th most common name by sound today, at an all-time high of 2,354 in 2025.
Colter has no common alternate spellings by sound.
Rising