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).
Brock
Brock has stayed fairly steady in American naming for generations. All-time it's been given to 46,137 U.S. babies, the 1,335th most common name by sound today, peaking at 1,459 in 2003, with 306 in 2025.
By sound, Brock also includes the spellings Broc.
Rising