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 500th most common name by sound today, peaking at 1,625 in 2025, with 1,625 in 2025.
By sound, Lorelei also includes the spellings Lorelai.
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).