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).
Nehemiah
Nehemiah has stayed fairly steady in American naming for generations. All-time it's been given to 22,439 U.S. babies, the 825th most common name by sound today, peaking at 969 in 2010, with 768 in 2025.
Nehemiah has no common alternate spellings by sound.
Rising