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).
Teagan
Teagan is now well below its former popularity. All-time it's been given to 38,608 U.S. babies, the 580th most common name by sound today, peaking at 2,445 in 2016, with 1,065 in 2025.
By sound, Teagan also includes the spellings Teegan. Spellings sometimes heard the same way: Tegan.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).