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).
Princeton
Princeton has stayed fairly steady in American naming for generations. All-time it's been given to 10,256 U.S. babies, the 1,039th most common name by sound today, peaking at 793 in 2017, with 422 in 2025.
Princeton has no common alternate spellings by sound.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).