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).
Alan
Alan is down from its peak but still widely used. All-time it's been given to 743,886 U.S. babies, the 251st most common name by sound today, peaking at 15,775 in 1955, with 2,696 in 2025.
By sound, Alan also includes the spellings Allen, Allan, Allyn, Alain.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).