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).
Alma
Alma has been climbing in recent years. All-time it's been given to 165,942 U.S. babies, the 877th most common name by sound today, peaking at 3,702 in 1918, with 696 in 2025.
Alma has no common alternate spellings by sound.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).