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).
Leonardo
Leonardo has climbed over the years and is holding near its high. All-time it's been given to 96,207 U.S. babies, the 175th most common name by sound today, peaking at 4,433 in 2019, with 3,789 in 2025.
Leonardo has no common alternate spellings by sound.
Rising