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).
Milan
Milan has been climbing in recent years. All-time it's been given to 28,165 U.S. babies, the 426th most common name by sound today, peaking at 1,977 in 2023, with 1,780 in 2025.
Milan has no common alternate spellings by sound.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).