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).
Itzel
Itzel has been climbing in recent years. All-time it's been given to 21,431 U.S. babies, the 795th most common name by sound today, peaking at 984 in 2005, with 850 in 2025.
Itzel has no common alternate spellings by sound.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).