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).
Dallas
Dallas climbed for decades and has been a steadily popular name ever since. All-time it's been given to 87,085 U.S. babies, the 412th most common name by sound today, peaking at 1,971 in 2015, with 1,888 in 2025.
Dallas has no common alternate spellings by sound.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).