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).
Stanley
Stanley is now well below its former popularity. All-time it's been given to 302,862 U.S. babies, the 1,435th most common name by sound today, peaking at 6,472 in 1954, with 278 in 2025.
Stanley has no common alternate spellings by sound.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).