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).
Javier
Javier has stayed fairly steady in American naming for generations. All-time it's been given to 108,463 U.S. babies, the 510th most common name by sound today, peaking at 2,646 in 2001, with 1,252 in 2025.
Javier has no common alternate spellings by sound.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).