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).
Skyla
Skyla is now well below its former popularity. All-time it's been given to 14,344 U.S. babies, the 1,364th most common name by sound today, peaking at 605 in 2012, with 257 in 2025.
Skyla has no common alternate spellings by sound.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).