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).
Liam
Liam has been climbing in recent years. All-time it's been given to 359,085 U.S. babies, the 2nd most common name by sound today, peaking at 22,288 in 2024, with 20,846 in 2025.
Liam has no common alternate spellings by sound.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).