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).
Alessandra is now well below its former popularity. All-time it's been given to 24,836 U.S. babies, the 809th most common name by sound today, peaking at 1,141 in 2015, with 697 in 2025.
Alessandra has no common alternate spellings by sound.
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).