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).
Jacob
Jacob is down from its peak but still widely used. All-time it's been given to 1,027,010 U.S. babies, the 72nd most common name by sound today, peaking at 37,956 in 1998, with 6,368 in 2025.
By sound, Jacob also includes the spellings Jakob, Jaycob.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).