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).
Colin
Colin has been slowly declining from its former popularity. All-time it's been given to 218,895 U.S. babies, the 444th most common name by sound today, peaking at 8,359 in 2004, with 1,607 in 2025.
By sound, Colin also includes the spellings Collin, Kollin.
Rising