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).
Nolan
Nolan climbed for decades and has been a steadily popular name ever since. All-time it's been given to 139,519 U.S. babies, the 133rd most common name by sound today, peaking at 5,845 in 2015, with 4,923 in 2025.
By sound, Nolan also includes the spellings Nolen.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).