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).
Matias
Matias has been climbing in recent years. All-time it's been given to 25,392 U.S. babies, the 370th most common name by sound today, peaking at 2,270 in 2024, with 2,140 in 2025.
Matias has no common alternate spellings by sound. Spellings sometimes heard the same way: Mathias, Matthias.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).