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).
Joaquin
Joaquin climbed for decades and has been a steadily popular name ever since. All-time it's been given to 35,654 U.S. babies, the 669th most common name by sound today, peaking at 1,250 in 2008, with 925 in 2025.
Joaquin has no common alternate spellings by sound.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).