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).
Lincoln
Lincoln has stayed fairly steady in American naming for generations. All-time it's been given to 106,968 U.S. babies, the 134th most common name by sound today, peaking at 8,443 in 2017, with 4,778 in 2025.
Lincoln has no common alternate spellings by sound.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).