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).
Messiah
Messiah has been climbing in recent years. All-time it's been given to 28,100 U.S. babies, the 415th most common name by sound today, peaking at 2,265 in 2021, with 1,675 in 2025.
Messiah has no common alternate spellings by sound.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).