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).
Barrett
Barrett has been climbing in recent years. All-time it's been given to 34,417 U.S. babies, the 393rd most common name by sound today, peaking at 2,178 in 2025, with 2,178 in 2025.
Barrett has no common alternate spellings by sound.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).