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).
Moises
Moises has stayed fairly steady in American naming for generations. All-time it's been given to 31,397 U.S. babies, the 1,009th most common name by sound today, peaking at 912 in 2001, with 502 in 2025.
Moises has no common alternate spellings by sound.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).