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).
Jada is now well below its former popularity. All-time it's been given to 98,611 U.S. babies, the 979th most common name by sound today, peaking at 5,827 in 2005, with 429 in 2025.
By sound, Jada also includes the spellings Jayda, Jaida.
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).