Teagan comes from the Irish surname Tadhgán — meaning "little poet" or "little philosopher" (from tadhg, poet). The Welsh form means "beautiful."
Teagan entered the U.S. top 1000 as a girls' name in 2005 and has been climbing rapidly. The musician Tegan Quin (of Tegan and Sara) is a famous bearer of the alternate spelling. Today Teagan sits in the U.S. top 400.
Teagan reduces to eight — the number of poetic resolve.