Other Forms FormsFenit, Féthnad, Féthnat
Of uncertain origin and meaning.The most widespread theory derives this name from Old Irish féth "mist" and -naid, a variant of the feminine diminutive suffix -nait. Some scholars argue, however, that this name might be derived from Old Irish féith which meant both "stream" and used to describe a kind of twining plant (the knowledge of what plant exactly that would have been is lost). One last theory tries to link this name to Old Irish fáth "prophesy".In Irish mythology, Féthnaid was the daughter of Fidach (a bard of the Tuatha Dé Danann) and an accomplished harpist. Her death was considered one of the "Three Great Losses" of the Tuatha.