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).
Marco
Marco was more common in the past and has since settled at a lower, steady level. All-time it's been given to 81,356 U.S. babies, the 712th most common name by sound today, peaking at 2,232 in 2005, with 934 in 2025.
By sound, Marco also includes the spellings Marko.
Rising