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).
Archer has been climbing in recent years. All-time it's been given to 31,803 U.S. babies, the 233rd most common name by sound today, peaking at 3,654 in 2025, with 3,654 in 2025.
Archer has no common alternate spellings by sound.
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).