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).
Miguel
Miguel is now well below its former popularity. All-time it's been given to 191,562 U.S. babies, the 410th most common name by sound today, peaking at 4,914 in 2007, with 1,661 in 2025.
Miguel has no common alternate spellings by sound.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).