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).
Allie
Allie is now well below its former popularity. All-time it's been given to 115,317 U.S. babies, the 407th most common name by sound today, peaking at 3,470 in 2010, with 1,795 in 2025.
By sound, Allie also includes the spellings Ali, Ally, Alli.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).