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).
King
King is now well below its former popularity. All-time it's been given to 37,890 U.S. babies, the 587th most common name by sound today, peaking at 2,705 in 2017, with 786 in 2025.
King has no common alternate spellings by sound.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).