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).
Mira has been climbing in recent years. All-time it's been given to 19,360 U.S. babies, the 665th most common name by sound today, peaking at 1,162 in 2025, with 1,162 in 2025.
By sound, Mira also includes the spellings Meera.
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).