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).
Garrett is now well below its former popularity. All-time it's been given to 154,407 U.S. babies, the 928th most common name by sound today, peaking at 6,656 in 2000, with 543 in 2025.
By sound, Garrett also includes the spellings Garret, Garett.
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).