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).
Alejandro was more common in the past and has since settled at a lower, steady level. All-time it's been given to 147,470 U.S. babies, the 403rd most common name by sound today, peaking at 4,577 in 2001, with 1,842 in 2025.
Alejandro has no common alternate spellings by sound.