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).
Bruce
Bruce is now well below its former popularity. All-time it's been given to 388,275 U.S. babies, the 986th most common name by sound today, peaking at 14,693 in 1956, with 558 in 2025.
Bruce has no common alternate spellings by sound.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).