Terminology
Ásatrú is an Icelandic (and equivalently Old Norse) term consisting of two parts. The first is Ása-, genitive of Áss, denoting one of the group of Norse gods called Æsir. The second part, trú, means "faith, word of honour; religious faith, belief" (archaic English troth "loyalty, honesty, good faith"). Thus, Ásatrú means "belief / faith in the Æsir / gods".
The term is the Old Norse/Icelandic translation of Asetro, a neologism coined in the context of 19th century romantic nationalism, used by Edvard Grieg in his 1870 opera Olaf Trygvason. The use of the term Ásatrú for Germanic heathenism preceding 19th century revivalist movements is therefore an anachronism.
Ásatrúarmaður (plural Ásatrúarmenn), the term used to identify those who practice Ásatrú is a compound with maður (Old Norse maðr) "man". In English usage, the genitive Asatruar "of Æsir faith" is often used on its own to denote adherents (both singular and plural).
Read more about this topic: Ásatrú In The United States