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).
Brynn
Brynn is now well below its former popularity. All-time it's been given to 39,072 U.S. babies, the 714th most common name by sound today, peaking at 2,058 in 2011, with 880 in 2025.
By sound, Brynn also includes the spellings Bryn.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).