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).
Marion
Marion is now well below its former popularity. All-time it's been given to 412,200 U.S. babies, the 1,219th most common name by sound today, peaking at 11,924 in 1924, with 372 in 2025.
By sound, Marion also includes the spellings Marian, Mariann.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).