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).
Elena climbed for decades and has been a steadily popular name ever since. All-time it's been given to 232,048 U.S. babies, the 43rd most common name by sound today, peaking at 8,492 in 2025, with 8,492 in 2025.
By sound, Elena also includes the spellings Alaina, Alayna, Elaina, Elayna, Elainna. Spellings sometimes heard the same way: Alena.
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).