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).
Elise is now well below its former popularity. All-time it's been given to 110,847 U.S. babies, the 452nd most common name by sound today, peaking at 2,987 in 2012, with 1,736 in 2025.
By sound, Elise also includes the spellings Elyse, Alyse, Alise, Elease. Spellings sometimes heard the same way: Alyce.
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).