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).
Oliver
Oliver is one of the fastest-rising names in America right now — a comeback after years of decline. All-time it's been given to 270,680 U.S. babies, the 5th most common name by sound today, peaking at 15,421 in 2024, with 14,963 in 2025.
Oliver has no common alternate spellings by sound.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).