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).
Edgar
Edgar is now well below its former popularity. All-time it's been given to 157,919 U.S. babies, the 857th most common name by sound today, peaking at 2,459 in 2005, with 617 in 2025.
Edgar has no common alternate spellings by sound.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).