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).
Blake has been easing down from its peak but is still widely used. All-time it's been given to 209,195 U.S. babies, the 279th most common name by sound today, peaking at 6,525 in 2012, with 2,212 in 2025.
By sound, Blake also includes the spellings Blayke.