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).
Jacoby
Jacoby is now well below its former popularity. All-time it's been given to 20,665 U.S. babies, the 1,207th most common name by sound today, peaking at 1,115 in 2008, with 308 in 2025.
By sound, Jacoby also includes the spellings Jakobe, Jacobi.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).