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).
Amalia
Amalia has been climbing in recent years. All-time it's been given to 16,478 U.S. babies, the 990th most common name by sound today, peaking at 576 in 2023, with 530 in 2025.
Amalia has no common alternate spellings by sound.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).