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).
Lillian
Lillian is down from its peak but still widely used. All-time it's been given to 504,643 U.S. babies, the 144th most common name by sound today, peaking at 10,238 in 1918, with 4,628 in 2025.
By sound, Lillian also includes the spellings Lilian, Lilyan, Lilyann.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).