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).
Irene
Irene was more common in the past and has since settled at a lower, steady level. All-time it's been given to 356,812 U.S. babies, the 1,144th most common name by sound today, peaking at 10,657 in 1921, with 442 in 2025.
Irene has no common alternate spellings by sound.
Rising