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).
Kyra
Kyra is now well below its former popularity. All-time it's been given to 38,308 U.S. babies, the 1,214th most common name by sound today, peaking at 1,918 in 2005, with 329 in 2025.
Kyra has no common alternate spellings by sound. Spellings sometimes heard the same way: Kaira.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).