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).
Tristan
Tristan is now well below its former popularity. All-time it's been given to 190,470 U.S. babies, the 446th most common name by sound today, peaking at 9,216 in 1996, with 1,394 in 2025.
By sound, Tristan also includes the spellings Tristen, Tristin, Triston, Trystan, Tristyn.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).