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).
Maximiliano
Maximiliano climbed for decades and has been a steadily popular name ever since. All-time it's been given to 23,972 U.S. babies, the 583rd most common name by sound today, peaking at 1,460 in 2019, with 1,209 in 2025.
Maximiliano has no common alternate spellings by sound.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).