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).
Iris
Iris has been climbing in recent years. All-time it's been given to 102,320 U.S. babies, the 231st most common name by sound today, at an all-time high of 3,741 in 2025.
Iris has no common alternate spellings by sound.
Rising