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).
Lyra has been climbing in recent years. All-time it's been given to 8,095 U.S. babies, the 892nd most common name by sound today, peaking at 711 in 2025, with 711 in 2025.
Lyra has no common alternate spellings by sound.
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).