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).
Luciano has been climbing in recent years. All-time it's been given to 17,631 U.S. babies, the 681st most common name by sound today, peaking at 1,118 in 2025, with 1,118 in 2025.
Luciano has no common alternate spellings by sound.
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).