Note 120 — Chapter XI · MYTHOLOGIES AND FOLK-TALES.
Reading edition
He is actually a reduplication of Thor; for his name means thunder, as does Thor’s. Thor is of course much more than a god of thunder only; but his hammer is undoubtedly the thunder-bolt. Thrym represents the same power associated with beings of frost and snow, the winter thunder, in fact. This stealing Thor’s hammer is merely a repetition of the idea implied by his name and character.