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).
Lawson
Lawson has stayed fairly steady in American naming for generations. All-time it's been given to 19,138 U.S. babies, the 777th most common name by sound today, peaking at 929 in 2021, with 884 in 2025.
Lawson has no common alternate spellings by sound.
Rising