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).
Uriah has stayed fairly steady in American naming for generations. All-time it's been given to 16,770 U.S. babies, the 1,081st most common name by sound today, peaking at 896 in 2009, with 501 in 2025.
By sound, Uriah also includes the spellings Urijah.