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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).
Virginia
Virginia is now well below its former popularity. All-time it's been given to 654,968 U.S. babies, the 958th most common name by sound today, peaking at 19,181 in 1922, with 572 in 2025.
Virginia has no common alternate spellings by sound.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).