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).
Keegan
Keegan is now well below its former popularity. All-time it's been given to 56,950 U.S. babies, the 865th most common name by sound today, peaking at 2,650 in 2007, with 647 in 2025.
By sound, Keegan also includes the spellings Keagan, Kegan.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).