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).
Leah
Leah climbed for decades and has been a steadily popular name ever since. All-time it's been given to 285,470 U.S. babies, the 112th most common name by sound today, peaking at 7,667 in 2009, with 5,406 in 2025.
By sound, Leah also includes the spellings Lia. Spellings sometimes heard the same way: Leia, Leigha.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).