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).
Rowan is one of the fastest-rising names in America right now. All-time it's been given to 96,213 U.S. babies, the 78th most common name by sound today, peaking at 7,550 in 2025, with 7,550 in 2025.
By sound, Rowan also includes the spellings Rohan, Rowen, Rohen. Spellings sometimes heard the same way: Roan.
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).