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).
Lorelei has been climbing in recent years. All-time it's been given to 28,442 U.S. babies, the 508th most common name by sound today, at an all-time high of 1,625 in 2025.
By sound, Lorelei also includes the spellings Lorelai.