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).
Callan
Callan has been climbing in recent years. All-time it's been given to 25,842 U.S. babies, the 356th most common name by sound today, peaking at 2,739 in 2025, with 2,739 in 2025.
By sound, Callan also includes the spellings Callen, Kallen.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).