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).
Judah has climbed over the years and is holding near its high. All-time it's been given to 36,431 U.S. babies, the 379th most common name by sound today, peaking at 2,178 in 2021, with 2,091 in 2025.
Judah has no common alternate spellings by sound.