* (female): 20th-century coinage from Welsh tegan (“pet, darling”).
* (surname): Transferred use of Irish Ó Tadhgáin, a surname.
* (male): From Teagan, from a diminutive of…
Borrowed from Irish Bréanainn (via Latin Brendanus), from Old Irish Brénainn, from Old Welsh breenhin (“prince, king”), ultimately from Proto-Celtic *brigantīnos (“(someone)…
* (female): 20th-century coinage from Welsh tegan (“pet, darling”).
* (surname): Transferred use of Irish Ó Tadhgáin, a surname.
* (male): From Teagan, from a diminutive of…