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).
Renata has stayed fairly steady in American naming for generations. All-time it's been given to 14,616 U.S. babies, the 926th most common name by sound today, peaking at 726 in 1980, with 635 in 2025.
Renata has no common alternate spellings by sound.