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).
Maren has stayed fairly steady in American naming for generations. All-time it's been given to 23,103 U.S. babies, the 800th most common name by sound today, peaking at 943 in 2021, with 852 in 2025.
By sound, Maren also includes the spellings Marin, Maryn.