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).
Rebecca
Rebecca is now well below its former popularity. All-time it's been given to 851,538 U.S. babies, the 501st most common name by sound today, peaking at 18,976 in 1981, with 1,346 in 2025.
By sound, Rebecca also includes the spellings Rebekah, Rebeca, Rebecka.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).