Teagan is a cousin of trendy names Reagan and Keagan now given to girls about six times as often as boys. As an Irish name, it's a diminutive of the original Tadhg. Teagan may also be a variation of the Welsh Tegan, a saint's name that means fair.

As Meghan/Megan and Reagan/Regan show signs of wilting, along comes Teagan to take up the slack: definitely one to consider. The vast majority of American babies named Teagan are now girls. A variant spelling is Teaghan.