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).
Gloria
Gloria is now well below its former popularity. All-time it's been given to 417,018 U.S. babies, the 1,120th most common name by sound today, peaking at 12,662 in 1947, with 437 in 2025.
Gloria has no common alternate spellings by sound.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).