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).
Summer
Summer has been climbing back after years of decline. All-time it's been given to 97,655 U.S. babies, the 385th most common name by sound today, peaking at 2,931 in 1977, with 2,000 in 2025.
By sound, Summer also includes the spellings Sommer.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).